Upustvo 169 245

A-Class and B-Class Model Refinement Introduction into Service Manual for Model Series 169 and 245

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Mercedes-Benz Service

A-Class and B-Class Model Refinement Introduction into into Service Ser vice Manual for Model Series 169 and 245

Daimler AG · Technische Information und Werkstatteinrichtung Werkstatteinrichtung (GSP/OI) · D-70546 Stuttgart

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Information and Copyright Ordering Workshop Information All printed workshop information from GSP/OI, such as Introduction into Service Manuals, System Descriptions, Function Descriptions, Technology Guides, Technical Data Manuals and adhesive labels, can be ordered as follows:

In Germany Through our GSP/OI Shop on the Internet Link: http: / / gs gsp-ti-shop.de or alternatively Emai Email: l: cust custom omer er.s .sup uppo port rt@d @dai aiml mler er.c .com om Phone: +49-(0)18 05 / 0 10-79 79 F ax : +49-(0)18 05 /0 /0 10-79 78

Outside Germany Please get in touch with the contact person responsible for your market.

Product Portfolio Comprehensive information about our full Product Portfolio can also be found at our Internet Portal. Link Link:: http http://ope ://open. n.af afttersa ersale les. s.da daiimler mler.c .com om

Questions and suggestions If you have any questions or suggestions concerning this product, please write to us. Emai Email: l: cust custom omer er.s .sup uppo port rt@d @dai aiml mler er.c .com om F ax : +49-(0)18 05 /0 /0 10-79 78 or alternatively Addre Address ss:: Daim Daimle lerr AG GSP/OIS HPC R822, W002 D-70546 Stuttgart

© 2008 by Daimler AG This document, including all its parts, is protected by copyright. Any further processing or use requires the previous written consent of Daimler AG, Department GSP/ OIS, HPC R822, W002, D-70546 Stuttgart. Stuttgart. This applies in particular to reproduction, distribution, alteration, translation, microfilming and storage and/or processing in electronic systems, including databases and online services.

Image no no. of of ti title im image: Orde Orderr no. no. of thi thiss publ public icat atio ion: n:

P00.01-3636-00 6516 6516 1360 1360 02

04/08

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Contents Preface

5

Overview Models and major assemblies

6

Brief description

8

A-Class equipment

10

B-Class equipment

14

Overall vehicle Exterior

18

Dimensions

24

Technical data

30

Interior

32

Maintenance

34

Drivetrain Technical data for engine

36

Engine model series M266

40

Engine model series OM640

42

Natural gas drive

45

ECO start/stop function

59

A-Class and B-Class Model Refinement, Introduction into Service Manual for Model Series 169 and 245 o – This printout will not be recorded by the update service. Status: 04 / 2008 –

3

Contents Chassis Brake system

70

Design Networking

72

On-board electrical system

76

Instrument cluster

78

Exterior lights

80

Outside mirrors

86

Power windows

87

Active Park Assist incl. PARKTRONIC

88

Audio and communication

92

Climate control

112

Bodywork

114

Special tools

4

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Drivetrain

116

Abbreviations

117

Index

119

A-Class and B-Class Model Refinement, Introduction into Service Manual for Model Series 169 and 245 – This printout will not be recorded by the update service. Status: 04 / 2008 –

Preface Dear reader, This Introduction into Service Manual presents the model refinement of the A-Class of model series 169 and the model refinement of the B-Class of model series 245. The purpose of this brochure is to acquaint you with the technical highlights of these vehicles in advance of their market launch. This brochure is intended to provide information for people employed in service, maintenance and repair as well as for aftersales staff. It is assumed here that the reader is already familiar with the Mercedes-Benz model series currently on the market. In terms of the contents, the emphasis in this Introduction into Service Manual is on presenting new and modified components and systems. This Introduction into Service Manual is not intended as an aid for repairs or for the diagnosis of technical problems. For such needs, more extensive information is available in the Workshop Information System (WIS) and in the Diagnosis Assistance System (DAS).

WIS is updated monthly. Therefore, the information available there reflects the latest technical status of our vehicles. The Introduction into Service Manual presents initial information relating to the refined A-Class and B-Class models of model series 169 and 245 and, as such, is not stored in WIS. The contents of this brochure are not updated. No provision is made for supplements. We will publicize modifications and new features in the relevant WIS documents. The information presented in this Introduction into Service Manual may therefore differ from the more up-to-date information found in WIS. All information relating to technical data, equipment and options is valid as of the copy deadline in April 2008 and may therefore differ from the current production configuration.

Daimler AG Technische Information und Werkstatteinrichtung (GSP/OI)

i Note Information about the vehicles and about operating the vehicle functions can also be found in the interactive owner's manual on the Internet at: www.mercedes-benz.de/betriebsanleitung


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Models and major assemblies

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W/C 169 Market Launch 06/2008

Model W 169.0 C 169.3

Engine

5-Speed Manual Transmission


Continuously Variable Automatic Transmission

A 150

169.031 169.331

266.920

716.520 716.525 1

—

722.801

A 170

169.032 169.332

266.940

716.520 716.525 1

—

722.801

A 200

169.033 169.333

266.960

716.521

—

722.801

A 200 Turbo

169.034 169.334

266.980

—

711.641

722.801

A 160 CDI

169.006 169.306

640.942

716.522

—

722.800

A 180 CDI

169.007 169.307

640.940

—

711.640

722.800

A 200 CDI

169.008 169.308

640.941

—

711.640

722.800

1

Only on vehicle variant with code (B01) ECO start/ stop function (as of 09 /2008)

P00.10-4431-00

Model refinement W 169 with 5 doors shown on A 170 ELEGANCE

6

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Models and major assemblies T 245 Market Launch 06/2008

Model

Engine



Continuously Variable Automatic Transmission

245.231

266.920

716.523 716.5261

—

722.801

245.232

266.940

716.520 716.5251

—

722.801

B 170 NGT*

245.233

266.960

716.520

—

722.801

B 200

245.233

266.960

716.521

—

722.801

B 200 Turbo

245.234

266.980

—

711.641

722.801

B 180 CDI

245.207

640.940

—

711.640

722.800

B 200 CDI

245.208

640.941

—

711.640

722.800

B 150

B 170

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1

Only on vehicle variant with code (B01) ECO start/ stop function (as of 09 /2008) * B 170 NGT BlueEFFICIENCY with code (924) Bivalent natural gas drive. The vehicle can either be operated on premium gasoline or natural gas. The vehicle model and eng ine model designation of this vehicle correspond to the B 200 m odel. Due to the lower engine power, it has the sales designation B 170 NGT BlueEFFICIENCY.

P00.10-4432-00

Model refinement of T 245 shown on B 170


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Brief description Vehicle concept

Standard equipment

With the model refinement (MOPF) of the A-Class and B-Class, the customer receives a vehicle with a redesigned exterior and new technical features and functions which are available in these vehicle classes for the first time.

As part of the model refinement, the basic equipment has been significantly improved with the following features.

This is achieved with a fully redesigned front section, new light alloy wheels, a new rear design and a newly accentuated interior in both vehicle classes. Equipped with the New Telematics Generation 2.5, the refined A-Class and B-Class models feature a new control and display concept with new functions and a new design. In addition, the different model lines of the A-Class are now classified into new equipment packages according to their visual appearance and features.

Innovations A-Class and B-Class • New drive concept with the ECO start/stop function for the A 150, A 170, B 150 and B 170 models (as of 09/ 2008) • Introduction of the New Telematics Generation 2.5 • Media Interface • DAB radio (GB version) • HILL START ASSIST • Adaptive brake lights which flash during emergency braking • Crash-active emergency lighting • New external release of rear-end door • Active Park Assist incl. PARKTRONIC

A-Class and B-Class • New body styling with: - Redesigned radiator grille - Modified engine hood - New bumper covers at front and rear - Door handles and outside mirrors in vehicle color - New exterior colors • New hubcaps • New light alloy wheels • Center console with modified stowage areas and cupholders • New surface with aluminum trim strips in cockpit and door panels • New seat cover materials and door lining materials • Auto on/off headlamps • New outside mirrors with larger mirror surfaces • Front power windows with automatic comfort control (model series 169.3 additionally features convenience closing and summer opening) • Ambient lamp and signal lamp in rear-end door

A-Class • New design of lamp units • New shape of rear lamps • Luggage compartment cover

B-Class • Longitudinal member panel in vehicle color • External loading sill protector

B-Class • New model with bivalent natural gas drive B 170 NGT BlueEFFICIENCY

8

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Brief description Dimensional concept

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With the model refinement, the vehicle length, the vehicle width and the overhangs of the A-Class have changed due to the new design of the bumper covers and the enlargement of the outside mirrors. On the refined B-Class models, this has resulted in a change to the vehicle length, vehicle width and rear overhang. The following tables show a selection of the dimensions affected by these changes.

A-Class (W/C 169.0/3) Dimensions

Unit

A 200 (previous)

A 200 (MOPF)

Difference

Vehicle length

mm

3,838

3,883

+45

Front overhang

mm

640

675

+35

Rear overhang

mm

630

640

+10

Vehicle width across outside mirrors

mm

1,975

2,040

+65

Front overhang angle

°

17.8

16.6

-1.2

Rear overhang angle

°

27.6

23.2

-4.4

B-Class (T 245) Dimensions

Unit

B 200 (previous)

B 200 (MOPF)

Difference

Vehicle length

mm

4,270

4,273

+3

Front overhang

mm

842

842

0

Rear overhang

mm

650

653

+3

Vehicle width across outside mirrors

mm

1,975

2,040

+65

Front overhang angle

°

14.5

13.5

-1.0

Rear overhang angle

°

27.8

22.6

-5.2


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A-Class equipment A 150

A 170

A 200

A 200 TURBO

A 160 CDI

A 180 CDI

A 200 CDI

Equipment lines/variants

Standard equipment

Standard

ELEGANCE line*

Code 955

AVANTGARDE line*

—

Standard

—

Code 955 Standard (optional)

Code 954

Sport package*

Code 954

Standard (optional)

Code 952

Drivetrain

ECO start/stop function (as of 09/ 2008)

Code B01

Diesel particulate filter

—

—

Standard

Brakes

HILL START ASSIST

Standard

Wheels, tires, light alloy wheels

15" steel wheel (basic equipment)

Standard

16" light alloy wheel in 10-double-spoke design (ELEGANCE)

Code R06

16" light alloy wheel in 5-spoke design (AVANTGARDE)

Code R78

—

Standard

—

Code R06

Standard (optional)

Code R78

Standard (optional)

* Extended equipment with a detailed description at the end of the A-Class equipment list

10

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A 170

A 200

A 200 TURBO

A 160 CDI

A 180 CDI

A 200 CDI

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16" light alloy wheel in 7-spoke design

Code R20


Code R74

18" light alloy wheel in AMG 5-spoke design

Code 791

Safety


Code 235

Tire pressure loss warner

Standard

Light systems

H7 reflector headlamps

Standard

Bi-xenon headlamps with cornering illumination

Code 614

Light and vision package

Code U62

Adaptive brake lights

Standard

Front fog lamps

Ambient lamp and signal lamp in rear-end door

Code U37

Standard

Code U37

Standard

Standard


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A 170

A 200

A 200 TURBO

A 160 CDI

A 180 CDI

A 200 CDI

Comfort systems

PTC heater booster

—

Luggage compartment roller blind

Standard Standard

Telephone, audio and communications communications systems

12

Comfort telephony

Code 386

Audio 20

Code 523

Audio 20 with integrated 6-disk CD changer

Code 510

Audio 50 APS

Code 525

Audio 50 APS with integrated 6-disk DVD changer

Code 511

COMAND APS

Code 527

COMAND APS with integrated 6-disk DVD changer

Code 512

Sound system (Harman/Kardon)

Code 810

Radio preinstallation with speakers

Code 533

Digital Audio Broadcasting (DAB) radio operation (GB)

Code 537

Media Interface (audio equipment interface)

Code 518

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A-Class equipment i Note

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The special equipment options listed do not cover all of the equipment available for the A-Class. Emphasis has been given to listing equipment options whereby the refined model differs from the previous A-Class.

ELEGANCE line, code (955)

Sport package, code (952)

The ELEGANCE line is significantly improved by the following additions to the standard equipment:

The sport package special equipment incorporates the following features on the interior and exterior of the A-Class:

• • • • •

Front Front fog fog lamps lamps with chrome chrome ring ring Seating Seating comfor comfortt packag package e ARTI ARTICO CO leat leathe herr 16" light light alloy alloy wheels wheels in 10-dou 10-double-s ble-spoke poke design design Polished Polished stainless stainless steel exhaust exhaust tip tip

Interior: • • • •

Spor Sportt peda pedall asse assemb mbly ly Spor Sportt sea seats ts (new (new)) Leather Leather steerin steering g wheel wheel with with sporty sporty design Leather Leather gearsh gearshift/ ift/ selector selector lever with aluminum aluminum cap • Silv Silverer-col colore ored d instrumen instrumentt cluster cluster

Exterior: • • • •

Exhaus Exhaustt end pipe pipe with with sporty sporty desig design n Rear Rear bumper bumper with with black black insert insert (new) (new) 17" light alloy wheels in 7-spoke 7-spoke design Sport Sportss sus suspe pens nsion ion

AVANTGARDE line, code (954) The AVANTGARDE line is significantly improved by the following additions to the standard equipment: • • • •

Front Front fog fog lamps lamps with chrome chrome ring ring Fron Frontt armr armres estt Seating Seating comfor comfortt packag package e Rear Rear bumpe bumperr with with black black ins insert ert


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B-Class equipment B 150

B 170

B 170 NGT

B 200

B 200 Turbo

B 180 CDI

B 200 CDI

Standard

Code 900

Standard

Equipment packages

Chrome package*

Code 900

Sport package*

Code 952

—

Code 952

Brakes

HILL START ASSIST

Standard

Drivetrain

ECO start/stop function (as of 09/ 2008)

Code B01

—


15" steel wheel Code (R00)

Standard

16" steel wheel Code (643)

—


—

Standard

Code R78

16" light alloy wheel in 5-double-spoke design

17" light-weight cast wheel in 10-spoke design

—

Standard

—

Standard

Code R78

Standard

Code 672

Code 25R

—

Code 25R

* Extended equipment with a detailed description at the end of the B-Class equipment list

14

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B 170

B 170 NGT

B 200

B 200 Turbo

B 180 CDI

B 200 CDI

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Wheels, tires, light alloy wheels 17" light alloy wheel in 5-spoke design, gloss chrome

Code R57

—

Code R57

17" light alloy wheel in 5-double-spoke design

Code R11

—

Code R11

18" light alloy wheel in AMG 5-spoke design

Code 791

—

Code 791

Light systems Adaptive brake lights

Standard

Safety Active Park Assist incl. PARKTRONIC

Code 235

Comfort systems Vertically and horizontally adjustable steering column

Standard

PTC heater booster

Standard

EASY-VARIO-PLUS system:

Code U57

—

Code U57

Telephone, audio and communications systems

Comfort telephony

Code 386

Audio 20

Code 523


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B 170

B 170 NGT

B 200

B 200 Turbo

B 180 CDI

B 200 CDI

Telephone, audio and communications systems

Audio 20 with integrated 6-disk CD changer

Code 510

Audio 20 with integrated 6-disk CD changer (Canada)

Standard

Audio 50 APS

Code 525

Audio 50 APS with integrated 6-disk DVD changer

Code 511

COMAND APS

Code 527

COMAND APS with integrated 6-disk DVD changer

Code 512

COMAND (Japan)

—

Standard

—

Digital Audio Broadcasting (DAB) radio operation (only GB)

—

Code 537

SIRIUS satellite radio (Canada)

—

Code 536

—

Speaker system with center speaker and bass box

Code 532

—

Code 532

Sound system (Harman/Kardon)

Code 810

—

Code 810

Media Interface (audio equipment interface)

16

Standard

o

Code 518


B-Class equipment Chrome package, code (900)

i Note The special equipment options listed do not cover all of the equipment available for the B-Class. Emphasis has been given to listing equipment options whereby the refined model differs from the previous B-Class.

w e i v r e v O

The chrome package special equipment incorporates the following features on the interior and exterior of the vehicle:

Interior • Chrome-plated trunk floor handle and inside trunk sill

Exterior

B 170 NGT BlueEFFICIENCY with bivalent natural gas drive, code (924) All of the equipment packages, exterior colors, upholstery variants and, with a few exceptions, all of the special equipment options available for the B-Class can also be ordered for the B 170 NGT model. The following special equipment options cannot be installed: • • • • • • • • • •

Sound system (Harman/ Kardon) Speaker system with bass box Run-flat wheel Spare wheel Sport package Sports suspension 17" or 18" light alloy wheels EASY-VARIO-PLUS system Emergency vehicles Load compartment floor adjustable to two levels (standard equipment) • Stationary heater (accessories range)

• Waistline trim strip with chrome • Slats of radiator grille in matt brilliant silver with chrome strips • Enlarged oval exhaust tailpipe in polished stainless steel • External loading sill protector in polished stainless steel • Front fog lamps with chrome ring • All-round protective strips with chrome inserts • Glossy "Crosspoint" exterior pillar trim On the B 200 CDI and B 200 Turbo models, the chrome package is included in the standard equipment.

Sport package, code (952) The sport package special equipment includes the features of the chrome package as well as the following additional features on the interior and exterior of the vehicle:

Interior • Instrument cluster with white illumination • Steering wheel with aluminum design elements and perforated leather • Leather gearshift/ selector lever with aluminum cap • Leather hand brake handle • Instrument cluster with white illumination • Upholstery in ARTICO man-made leather/"Bastogne" material • Pedals with stainless steel caps and rubber naps

Exterior • 17" light alloy wheels in new 10-spoke design • Sports suspension • Front fog lamps with chrome ring and fin • Rear bumper with reflector design


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e l c i h e v l l a r e v O

Exterior Front view of A-Class The stylistic features at the front of the vehicle mean that the individual model lines are now much more clearly differentiated than before. Whereas the d esign of the radiator grille and the chrome applications were the main differentiating features on the previous models, the design of the air inlets in the bumper cover also varies on the new A-Class. On the basic equipment model and the ELEGANCE line, a horizontal fin in the vehicle color runs through the center of the air inlet in the bumper, giving the vehicle a wider appearance. The new bumper cover clearly differentiates the AVANTGARDE line from the two other equipment variants. On the AVANTGARDE line, the pointed shape of the front section is strongly emphasized by the slanted dividing bars of the bumper cover.

P00.10-4440-00

Front view of standard vehicle

On the basic equipment model, the radiator grille is a grained black color with high-gloss black trim strips, whereas on the ELEGANCE line it is atlas gray with chrome applications. On the AVANTGARDE line it is iridium silver in color and also features chrome applications. On vehicles with basic equipment that are fitted with front fog lamps, the lamps are framed by a black ring. On ELEGANCE and AVANTGARDE vehicles with front fog lamps, the ring is chrome-plated. The trim strip concept is based on that of model series 204. The rub strips are no longer installed. Instead, the ELEGANCE and AVANTGARDE lines feature all-round chrome applications integrated into the bumper covers. On the basic equipment model, the chrome trim strip is missing from the respective recesses in the bumper cover.

P00.10-4439-00

Front view of ELEGANCE line

P00.10-4438-00

Front view of AVANTGARDE line

18

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Exterior Rear view of A-Class The design measures implemented at the rear end are intended to make the vehicle appear smaller in height than it actually is. The rear lamps therefore have smaller vertical dimensions than those of the predecessor model and the shiny cover lenses feature a new red-white-red color pattern. On the ELEGANCE and AVANTGARDE lines, the effect of the redesigned rear lamps is emphasized by trim overlays in a reflector design in the bumper. The handle strip of the rear-end door has been redesigned in combination with the revamped release handle. On the basic equipment model, the handle strip is grained black in color and on the ELEGANCE and AVANTGARDE lines it features a chrome design.

The bumper surfaces have been reshaped to make the refined A-Class model appear to sit low and wide on the road. With a black insert in the bumper, the AVANTGARDE line has an even sportier edge.


The new antenna on the roof has been shortened and is now suitable for use in automatic car wash facilities.

P00.10-4442-00

Rear view of model 169.3, standard vehicle


19


Exterior Side view of A-Class On the side of the vehicle, the previous combination of rub strips with chrome inserts has been replaced on the ELEGANCE and AVANTGARDE lines with chrome strips. The logo indicating the equipment line has been adopted from model series 204 and is located on the mirror triangle. The basic equipment model has been significantly improved by the addition of outside mirror housings in the vehicle color with larger mirror surfaces and door handles that are also painted in the vehicle color.

The design of the light alloy wheels has been revised and 16" light alloy wheels are now the entry-level version on the A-Class. The basic equipment model features 15" steel wheels with new hubcaps in a 10-hole design. The ELEGANCE line is available with 16" light alloy wheels in a 10-double-spoke design and the AVANTGARDE line is available with 16" light alloy wheels in a 5-spoke design. Light alloy wheels in a 7-spoke design can be ordered as special equipment for any of the vehicles regardless of the basic equipment or line. The range of 17" and 18" light alloy wheels on offer is unchanged. All of the light alloy wheels for the A-Class are painted in titanium silver.

P00.10-4443-00

Side view of model 169.0 AVANTGARDE

20

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Exterior Front view of B-Class The front view of the B-Class has been redesigned with a three-slat radiator grille featuring chrome applications. On the standard version, the slats of the radiator grille are atlas gray in color, whereas they are matt brilliant silver on vehicles with the chrome package or sport package. The air inlets in the bumper cover now feature an even more distinctive appearance. The separation line between the engine hood and bumper cover has been redesigned to be more wellbalanced.

On vehicles with front fog lamps, the lamps are framed by chrome rings. The chrome ring also features a horizontal fin with a chrome edge on vehicles with the sport package equipment.


In addition, chrome applications are integrated into the bumper cover on vehicles with the chrome package and sport package equipment variants. On the standard version, the chrome trim strip is missing from the respective recesses in the bumper cover.

P00.10-4444-00

Front view of model 245 with chrome package, code (900)


21


Exterior Rear view of B-Class The rear view of the B-Class is characterized by a number of new features. These include the redesigned trunk lid handle and the loading sill protector made of grained black pl astic or, on vehicles with the chrome or sport package, polished stainless steel. Other features include the rear lamps in a shiny design or the new bumper with a fine-grained black insert as standard to give the rear end an even sportier tone. On vehicles with the sport package special equipment, this impression is further emphasized by trim overlays in a reflector design in the bumper.

P00.10-4445-00

Rear view of model 245 with chrome package, code (900)

22

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Exterior Side view of B-Class Viewed from the side, the appearance of the vehicle has been further improved by outside mirrors, door handles and longitudinal members which are painted in the vehicle color as standard.


The design of the wheels has also been revised as part of the model refinement. The hubcaps of the B-Class have now been redesigned with circular holes and the vehicle is also available with new 16" light alloy wheels in a double-spoke design or in a 5-spoke design. The range of 17" light alloy wheels has been extended with two new wheel design variants.

P00.10-4446-00

Side view of model 245 with sport package, code (952)


23


Dimensions

1595 0 0 4 2 4 4 0 1 . 0 0 P

1552 1764

1547 2040

989

483 512 291

983 1318 689 490

840

984 701

358 613 525

675

2568 3883

1433

640

1448

1412

1385

Vehicle dimensions shown on 3-door A 200 (model 169.3)

24

o

Dimensions under no load


Dimensions


1595

0 0 5 2 4 4 0 1 . 0 0 P

1552 1764

1547 2040 3569 2415

1057

1984 1799

1886

613 1)23,2°

)16,6°

1

2568 3883 2)4004

675

2)19,4°

1)9,9°

1)85

640

10,95 m 3080 5,95 m

Vehicle dimensions (garage dimensions) shown on 3-door A 200 (model 169.3)


1

) At permissible gross vehicle weight ) With trailer hitch and protective cap (special equipment)

2


25


Dimensions

1595

0 0 6 2 4 4 0 1 . 0 0 P

1552 1764

1547 2040

989

506 512 291

983 1318 689 504

840 975 723

358 525 613

2568 3883

675

1422

1411

640

1444

1381

Vehicle dimensions shown on 5-door A 200 (model 169.0)

26

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Dimensions


1595

0 0 7 2 4 4 0 1 . 0 0 P

1547 2040

1552 1764

3569 2184 1057

1984 1799 1886

613

1)9,9°

1)16,6°

1)23,2° 2)19,4°

1)85

2568 3883 2)4004

675

10,95 m

640

2804 5,95 m

Vehicle dimensions (garage dimensions) shown on 5-door A 200 (model 169.0)


1


2


27


Dimensions

1604 0 0 8 2 4 4 0 1 . 0 0 P

1552 1777

1547 2040

989

980 1475

488 501

716 496

303

850

920 898

381 622 536

842

2778

653

4273

1422

1411

1446

1382

Vehicle dimensions shown on B 200 (model 245.2)

28

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Dimensions


1604

0 0 9 2 4 4 0 1 . 0 0 P

1552 1777

1547 2040

3682 2386 1257

1981

1981

1747

1855

622 )22,6°

1

)13,5°

1

) 91 2778 4273 2)4365

842

11,95 m

2)20,5°

) 9,5°

1

1

653

2805 6,55 m

Vehicle dimensions (garage dimensions) shown on B 200 (model 245.2)


1


2


29


Technical data A-Class

Unit

A 200 (previous)

A 200 (MOPF)

Wheelbase

mm

2,568

2,568

Front track width

mm

1,552

1,552

Rear track width

mm

1,547

1,547

Vehicle length

mm

3,838

3,883

Vehicle width

mm

1,764

1,764

Vehicle width (with outside mirrors folded out)

mm

1,975

2,040

Vehicle height

mm

1,595

1,595

Drag coefficient

Cd

0.31

0.31

Unit

A 200 (previous)

A 200 (MOPF)

Curb weight as per EC directive, 3-door/5-door

kg

1,240/1,270

1,240/1,270

Permissible gross vehicle weight, 3-door/5-door

kg

1,765/1,765

1,765/1,765

Payload, 3-door/5-door

kg

525/495

525/495

Dimensions

A-Class

Dimensions and weights

Max. seating capacity Maximum luggage compartment payload

30

5 kg

100

Trunk capacity (to top edge of rear backrest)

l

Turning circle

m

10.95

Tank capacity/reserve

l

54/6

o

435

435


Technical data B-Class

Unit

B 200 (previous)

B 200 (MOPF)

Wheelbase

mm

2,778

2,778

Front track width

mm

1,552

1,552

Rear track width

mm

1,547

1,547

Vehicle length

mm

4,270

4,273

Vehicle width

mm

1,777

1,777

Vehicle width (with outside mirrors folded out)

mm

1,975

2,040

Vehicle height

mm

1,604

1,604

Cd

0.30

0.31

Dimensions

Drag coefficient

B-Class

Unit

B 200 (previous)

B 200 (MOPF)

B 170 NGT (MOPF)

Curb weight as per EC

kg

1,345

1,345

1,470

Permissible gross vehicle weight

kg

1,880

1,880

1,950

Payload

kg

535

535

480


Dimensions and weights

Max. seating capacity

5

Maximum luggage compartment payload

kg

100

Trunk capacity* (to top edge of rear backrest)

l

544

544

Turning circle

m

11.95

Tank capacity/reserve (gasoline)

l

54/6

Tank volume (natural gas)

l

—

544

100

* When load compartment floor not lowered


31


Interior General

A-Class

The interior of the A-Class and B-Class has been redesigned as part of the model refinement to further increase the perception of quality and to tighten up the linear design. The following changes have been made to achieve this new appearance on the two models:

On the redesigned A-Class, the previous upholstery materials have been replaced by the "Mechelen" and "Namur" upholstery fabrics on vehicles with basic equipment. The ELEGANCE and AVANTGARDE lines are equipped with the combination of ARTICO man-made leather and "Bastogne" material. On vehicles with the sport seat special equipment, the combination of ARTICO man-made leather and "Zandvoort" material is available. A leather interior is only available with the comfort package special equipment and is not available for vehicles equipped as standard. The AVANTGARDE line features trim in smoke silver aluminum with an obliquely brushed surface.

P68.00-5262-00

Interior design of A-Class

32

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Interior B-Class On the redesigned B-Class, the standard version is equipped with "Groningen" upholstery fabric, whereas special equipment models feature the combination of ARTICO man-made leather and "Bastogne" material together with the sport package.


On vehicles with the sport seat special equipment, the combination of ARTICO man-made leather and "Zandvoort" material is available. The range of leather special equipment remains unchanged. The trim is made of smoke silver aluminum with an obliquely brushed surface.

P68.00-5382-00

Interior design of B-Class


33


Maintenance Extended maintenance strategy for A-Class and B-Class Both workshops and the customer will benefit from the extended maintenance scopes from the very first kilometer driven. By making maintenance less complicated and introducing the basic service which covers the technically essential items, workshops are able to offer maintenance that is more cost-efficient and competitive without compromising the usual Mercedes-Benz service quality. Previously, the maintenance scopes alternated between the minor service (Service A) and the major service (Service B). These services have now been classified as Basic service A and B respectively, covering the technically essential items. Basic services A and B always alternate (fixed interval of every 25,000 km/ 1 year) and only include the technically essential service items. A PLUS package which includes further checks and maintenance items is available additionally.

Digital Service Booklet (DSB) All service, body and major assembly operations are documented in a central database using the Digital Service Booklet (DSB). The customer receives a service report which he/she stores in the service booklet.

i Note about DSB For further information about the DSB, see the brochure "ASSYST PLUS Maintenance, Extended Maintenance Strategy for Model Series as of Modification Year 2008". Order no.: 6516 1355 02 This brochure can be ordered from the GSP/OI Shop.

PLUS package: • • • • • • •

Check windshield washer system Check headlamp cleaning system Check tire pressure Check expiration date of tire repair kit Inspect wiper blades Check trunk illumination Check indicator lamps in instrument cluster and interior compartment • Check headlamp adjustment This PLUS package is a customer option.

Maintenance interval The kilometer intervals are adapted to market-specific requirements. The maximum maintenance interval is 25,000 km or one year.

Mileage-based servicing ASSYST PLUS calculates in mileage-based servicing mode when the kilometer interval for the engine oil is reached before the time interval. Example of mileage-based servicing:

ServicePackagePricingSystem (SPPS) The aftersales system is used to work out and display the necessary maintenance scopes. The additional operations that are due as well as the duration and cost of the service can be determined by entering the workshop code.

34

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• Engine oil interval 25,000 km/ 365 days (1 year) • Driving behavior of customer: 120 km/ day • 25,000 km : 120 km ≈ 208 days ASSYST PLUS now calculates in mileage-based servicing mode because the kilometer interval for the engine oil of 25,000 km is reached before a year has passed.


Maintenance Time-based servicing ASSYST PLUS calculates in time-based servicing mode when the time interval for the engine oil is reached before the kilometer interval. Example of time-based servicing: • Engine oil interval 25,000 km/ 365 days (1 year) • Driving behavior of customer: 50 km/ day • 25,000 km : 50 km ≈ 500 days

i Note The indicator for remaining distance or time in the display may switch between kilometers and time depending on the driving behavior of the customer.


ASSYST PLUS now calculates in time-based servicing mode because the time interval of 365 days (1 year) is reached before the 25,000 km.

Service indicator

Workshop display

The following service information is displayed on the instrument cluster by ASSYST PLUS:

The workshop display is stored in the maintenance computer and is read out by the customer service advisor via the instrument cluster or STAR DIAGNOSIS. The following information can be displayed:

• • • •

Service interval/ service code Remaining distance Remaining time Fault and warning messages

The display messages are either shown in white (service information) or red (fault and warning messages).

• Read out workshop code • Reset service indicator • Read out service scope

P54.32-6126-00

Service scope (mileage-based servicing) A1p13 Multifunction display

P54.32-6130-00

Service code A1p13 Multifunction display


35

n i a r t e v i r D

Technical data for engine A-Class

Unit

A 150

A 170

A 200

Engine model designation

M266.920

M266.940

M266.960

Engine designation

M266 E15

M266 E17

M266 E20

Engine data

Engine configuration/ no. of cylinders

Inline 4

Fuel

RON

Displacement

cm3

Bore

mm

Stroke

mm

95 (premium unleaded) 1,498

1,699

2,034

83 69.2

78.5

94

12.6 13.5

10.9 11.5

9.8 9.9

175 170

188 183

200 195

6.2 – 6.7 6.6 – 7.0

6.6 – 6.8 6.6 – 7.1

7.2 – 7.4 7.2 – 7.4

148 – 159 157 – 166

157 – 163 157 – 169

172 – 176 172 – 176

l/100 km

5.8 – 6.2

6.1 – 6.5

—

g/km

139 – 149

146 – 154

—

Driving performance/fuel economy Acceleration 0...100 km /h Manual transmission Automatic transmission Maximum speed Manual transmission Automatic transmission Fuel economy, overall (NEDC), Manual transmission Automatic transmission

CO2 emissions, manual transmission automatic transmission

s

km/h

l/ 100 km

g/km

Vehicles with code (B01) ECO start/stop function Fuel economy, overall (NEDC) CO2 emissions

36

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Technical data for engine A 200 TURBO

A 160 CDI

A 180 CDI

A 200 CDI

M266.980

OM640.942

OM640.940

OM640.941

M266 E20 LA

OM 640 D20 RED

OM640 D20

OM640 D20 GST

n i a r t e v i r D

Inline 4 98 (Super Plus unleaded)

Diesel

2034

1991 83

94

92

7.5 7.3

15.0 15.3

10.8 11.1

9.5 9.6

228 220

170 165

186 181

201 196

7.9 – 8.1 7.9 – 8.1

4.9 – 5.2 5.4 – 5.8

5.0 – 5.2 5.4 – 5.8

5.3 – 5.4 5.7 – 6.0

187 – 192 187 – 192

128 – 137 142 – 154

134 – 138 142 – 154

138 – 140 149 – 159

— —


37

n i a r t e v i r D

Technical data for engine B-Class

Unit

B 150

B 170

B 170 NGT

Engine model designation

M266.920

M266.940

M266.960

Engine designation

M266 E15

M266 E17

M266 E20 CNG

Engine data

Engine configuration/no. of cylinders

Inline 4

Fuel

RON

Displacement

cm3

Bore

mm

Stroke

mm

95 (premium unleaded)

1,498

1,699

95 (premium unleaded) Natural gas (CNG) 2,034

83 69.2

78.5

94

13.2 14.2

11.3 12.0

12.4 13.2

174 168

184 180

184 180

6.6 – 6.8 6.9 – 7.1

6.8 – 7.1 7.1 – 7.3

7.3 7.6

— —

— —

4.9 5.1

158 – 163 166 – 171

163 – 171 171 – 175

175 181

— —

— —

135 139

l/100 km

6.2 – 6.5

6.4 – 6.6

—

g/km

148 – 153

152 – 158

—

Driving performance/fuel economy Acceleration 0...100 km/h Manual transmission Automatic transmission

Maximum speed Manual transmission Automatic transmission

s

km/h

Fuel economy, overall (NEDC), Manual transmission Automatic transmission

l/ 100 km

CNG with manual transmission CNG with automatic transmission

kg/100km

CO2 emissions, manual transmission automatic transmission

g/km

CNG with manual transmission CNG with automatic transmission

Vehicles with code (B01) ECO start/stop function Fuel economy, overall (NEDC) CO2 emissions

38

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Technical data for engine B 200

B 200 Turbo

B 180 CDI

B 200 CDI

M266.960

M266.980

OM640.940

OM640.941

M266 E20

M266 E20 LA

OM640 D20

OM640 D20 GST

n i a r t e v i r D

Inline 4 95 (premium unleaded)

98 (Super Plus unleaded)

Diesel

2,034

1,991 83

94

92

10.1 10.2

7.6 7.4

11.3 11.8

9.6 9.7

196 190

225 218

183 178

200 195

7.2 – 7.5 7.3 – 7.5

7.9 – 8.1 8.1 – 8.2

5.2 – 5.4 5.6 – 6.0

5.4 – 5.6 6.0 – 6.3

— —

— —

— —

— —

173 – 180 175 – 180

190 – 195 195 – 197

137 – 140 148 – 158

140 – 148 159 – 165

— —

— —

— —

— —

— —


39

n i a r t e v i r D

Engine model series M266 The A-Class and B-Class are still equipped with the familiar engine variants from engine model series M266. The basic engines have not been modified or further developed. A new feature is the ECO start/stop function with a belt-driven starter generator for the M266.920 and M266.940, which is available for the first time in both the A-Class (A 150/170) and B-Class (B 150/170).

i Note A separate Introduction into Service Manual is available for engine series model series M266. Order No. 6516 1298 02 The ECO start/ stop function and natural gas drive system are described in more detail below.

In addition, a vehicle with bivalent drive is available for the first time in a compact class Mercedes-Benz vehicle with the B 170 NGT BlueEFFICIENCY. The M266 E20 CNG engine used in this model is based on the familiar M266.960 from the B 200.

P01.00-3038-00

M266.960 from A 200

40

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Engine model series M266 A 150 B 150

A 170 B 170

A 200 B 200

A 200 Turbo B 200 Turbo

Rated output at engine speed

kW (hp) at rpm

70 (95) 5,200

85 (115) 5,500

100 (136) 5,500

142 (193) 5,000

Rated torque at engine speed

Nm at rpm

140 3,500 – 4,000

155 3,500 – 4,000

185 3,500 – 4,000

280 1,800 – 4,850

Compression ratio

1 : 11.0

ε

P01.00-3044-00

Performance graph 70 kW

M P

Torque Power output

1 : 9.0

P01.00-3043-00


P01.00-3042-00


n i a r t e v i r D

P01.00-3045-00

Performance graph 142 kW n

Rpm


41

n i a r t e v i r D

Engine model series OM640 The familiar diesel engines of engine model series OM640 with a displacement of 1,991 cm 3 are used in the A-Class and B-Class. As previously, these economical engines are equipped with: • • • • •

i Note A separate Introduction into Service Manual is available for engine series model series OM640. Order No. 6516 1298 02

Four valves per cylinder Two camshafts Common Rail Injection Turbocharger with charge air cooling Cooled exhaust gas recirculation with intake air throttling

A new feature is the Lanchester balancer installed on the 180 CDI and 200 CDI engines of the A-Class and B-Class since 03/2008.

P01.00-3041-00

OM640.940 from A 180 CDI

42

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Engine model series OM640


A 160 CDI

A 180 CDI B 180 CDI

A 200 CDI B 200 CDI

60 (82) 4,200

80 (109) 4,200

103 (140) 4,200

180 200 1,400 – 2,600

250 250 1,600 – 2,600

300 280 1,600 – 3,000

kW (hp) at rpm

Rated torque Manual transmission Automatic transmission at engine speed

Nm

at rpm

Compression ratio

1 : 18.0

ε

P01.00-3046-00


M P n

n i a r t e v i r D

Torque Power output Rpm

P01.00-3047-00


i Note The performance graphs apply to vehicles with manual transmission.

Performance graph of 103 kW variant See next page


43

n i a r t e v i r D

Engine model series OM640 i Note The performance graph applies to vehicles with manual transmission.

M P n


P01.00-3048-00


Lanchester balancer In order to further increase the ride comfort of the diesel engines, a Lanchester balancer has been installed in the 180 CDI and 200 CDI engines of the A-Class and B-Class since 03/2008. The Lanchester balancer consists of two forged shafts supported by multiple bearings which are located underneath the crank assembly and rotate in opposite directions to each other at twice the crankshaft speed. This technology significantly reduces noise emissions and vibration. The Lanchester balancer of engine OM640 is based on the technology of the balancer in engine OM646. With the Lanchester balancer, the oil capacity of diesel engines OM640.940 and OM640.941 is reduced. See the following basic data document in the Workshop Information System (WIS) for the exact filling capacities: • BF18.00-P-1000-01S

P01.40-2229-00

Model of Lanchester balancer

44

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Natural gas drive Bivalent drive system

Advantages

The B 170 NGT BlueEFFICIENCY is the first compact model from Mercedes-Benz with a bivalent natural gas drive, code (924). This vehicle can either be operated with CNG (Compressed Natural Gas) or premium gasoline.

The main advantage of the CNG system is that the CO2 emissions are 20% lower than those of comparable gasoline powered vehicles. With a consumption of 4.9 kg of natural gas per 100 km, the B 170 NGT BlueEFFICIENCY with manual transmission emits approximately 135 g of CO2 per kilometer. The fuel costs are lower than on a comparable gasoline vehicle.

With its Natural Gas Technology (NGT), Mercedes-Benz provides its customers with the option of using either "H-gas" with a high gross calorifi c value or "L-gas" with a low gross calorific value for natural gas operation depending on availability. LPG (Liquefied Petroleum Gas) may not be used in this model.

n i a r t e v i r D

i Note The B 170 NGT BlueEFFICIENCY can also be fueled with biogas (biomethane) that has been processed appropriately.

P07.54-2055-00

Overview of bivalent drive system


45

n i a r t e v i r D

Natural gas drive B 170 NGT BlueEFFICIENCY


kW (hp) at rpm

85 (115) 5,750

Rated torque at engine speed

Nm at rpm

165 3,000 – 4,000

ε

1 : 11.0

Compression ratio

P01.00-3050-00

Performance graph for operation with gasoline or natural gas

M P n

46

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Natural gas drive Natural gas

Components of natural gas drive

CNG (Compressed Natural Gas) is a primary energy source which can be used as a fuel without further chemical processing. The natural gas is stored in gas cylinders made of a plastic composite material at a nominal pressure of up to 200 bar. The gas cylinders are filled via a filling connection located beside the gasoline tank filler neck behind the fuel filler flap.

The following components have been added to engine 266.960 and the fuel system:

Natural gas is classified according to its gross calorific value into "H-gas" (H=High) with a high proportion of methane (89-98%) and "L-gas" (L=Low) with a low proportion of methane (approx. 85%). • H-gas has a gross calorific value of over 11 kWh/m 3 • L-gas has a gross calorific value of approx. 9.5 kWh/m 3

n i a r t e v i r D

• CNG control unit • Filler connection for natural gas, located behind the fuel filler flap • 5 gas cylinders located in the underfloor area, each equipped with a gas cylinder shutoff valve • Gas pressure regulator unit with a gas safety shutoff valve and gas high-pressure sensor, which reduces the system high-pressure of approx. 200 bar to the system low-pressure of approx. 6.5 bar. • Low-pressure gas shutoff valve in the gas line to the gas distribution rail • Gas distribution rail with one gas injection valve per cylinder • Gas low pressure sensor • Gas temperature sensor

Due to the differences in energy content, operating the vehicle on H-gas increases the range by up to 20% compared to operation with L-gas. • Natural gas is measured in kilograms. One kilogram of natural gas provides about the same gross calorific value as 1.5 liters of gasoline. • There is a cost benefit compared to gasoline and diesel fuel because the price of natural gas is lower. Some private subsidies from the gas industry and public sponsorship programs are available to assist the buyer when purchasing a natural gas vehicle. Natural gas is not the same as liquefied petroleum gas. Liquefied petroleum gas (LPG) is a refined product. It occurs during the distillation of crude oil and, in contrast to CNG, is heavier than air. It collects on the ground and is more volatile than CNG. Liquefied petroleum gas (LPG) may not be used in the B 170 NGT BlueEFFICIENCY.

i Note Only qualified staff may perform work on the gas system. After every repair, every time components are replaced and in the event of accidents affecting the gas system, a gas system check (GAP) must be performed. A gas system check must be performed every two years and is carried out at the same time as the main inspection (HU). If an unscheduled gas system check is performed but, at the time of the main inspection, the unscheduled gas system check was over 12 months ago, then the gas system check must be repeated again along with the main inspection. The gas system check may only be performed by qualified, specialist personnel who have successfully completed a training course.


47

n i a r t e v i r D

Natural gas drive Function The actuation signals for the fuel injection valves are transferred from the ME-SFI [ME] control unit to the CNG control unit via direct lines. This control unit then actuates the fuel injection valves or the gas injection valves directly. The ME-SFI [ME] control unit calculates the valve opening point and valve opening duration individually for each of the fuel injection valves and each of the gas injection valves. Data is continuously exchanged between the ME-SFI [ME] control unit and the CNG control unit via the drivetrain sensor CAN (CAN I). Each time gas refueling is detected, the quality of the new gas is determined by the mixture adaptation function. The potential range of the vehicle is heavily dependent on the quality of the gas. The CNG control unit detects that the vehicle has been refueled based on the pressure difference (before and after refueling). During engine start, the vehicle briefly switches to gasoline operation – even when set to gas operation mode. Depending on certain variables, e.g. engine operating temperature, the vehicle operates on gasoline until the operating temperature is reached. This operating condition can last from several seconds up to several minutes. If the temperature in the gas distributor remains permanently below -15 °C at extremely low outside temperatures, the vehicle does not switch to gas operation mode.

i Note There must always be sufficient gasoline in the tank to enable the vehicle to be started.

Safety shutoff A safety shutoff can be triggered by a system fault or a crash signal. If a fault in the natural gas system is detected, the system may be shut off for safety reasons. The system can then only be reactivated by erasing the fault using DAS. The natural gas and gasoline injection system is shut off by a crash signal. The gasoline injection system will be operational for the next engine start if the necessary functional requirements can be met. The natural gas system can only be reactivated via DAS after a crash signal.

Changing operating mode The driver can set the desired operating mode, gasoline or natural gas operation, on the multifunction display of the instrument cluster using the multifunction steering wheel. It is always possible to switch between the two operating modes if there is sufficient fuel.

48

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Natural gas drive

n i a r t e v i r D

P07.54-2056-00

Block diagram of CNG injection system in B 170 NGT BlueEFFICIENCY B18/1 B18/2 B50/3 K100kG K100kL N3/10 N118/2 Y62y1 Y62y2 Y62y3 Y62y4

Gas high-pressure sensor Gas low-pressure sensor Gas temperature sensor Circuit 15 relay (1) Circuit 87 relay, engine ME-SFI [ME] control unit CNG control unit Cylinder 1 fuel injection valve Cylinder 2 fuel injection valve Cylinder 3 fuel injection valve Cylinder 4 fuel injection valve

Y106/1 Y106/2 Y106/3 Y106/4 Y107/ 1y1 Y107/ 1y2 Y107/ 1y3 Y107/ 1y4 Y107/ 1y5 Y107/2 Y107/3

Cylinder 1 gas injection valve Cylinder 2 gas injection valve Cylinder 3 gas injection valve Cylinder 4 gas injection valve Gas cylinder 1 shutoff valve Gas cylinder 2 shutoff valve Gas cylinder 3 shutoff valve Gas cylinder 4 shutoff valve Gas cylinder 5 shutoff valve Gas safety shutoff valve Low-pressure gas shutoff valve

CAN I

Drivetrain sensor CAN


49

n i a r t e v i r D

Natural gas drive Natural gas system In addition to the conventional fuel tank, five gas cylinders made of a plastic composite material are installed in the vehicle. Two of these are l ocated in the vehicle floor underneath the front passenger seat and the three others are located in the underfloor area at the rear of the vehicle.

The five gas cylinders can hold a total volume of 100 l when filled with H-gas. This corresponds to a capacity of approx. 16 kg of H-gas at a pressure of 200 bar and a gas temperature of 15 °C. By installing the gas cylinders in the underfloor area, the versatility of the vehicle and the space available are almost completely unaffected. Only the lower level of the adjustable load compartment floor is no longer available for use.

P07.54-2057-00

Rear gas cylinders 1 2 3 6 7 8

50

Gas cylinder 1 Gas cylinder 2 Gas cylinder 3 Gas filler connection with check valve Gas fill line T-piece with check valve

o

Y107/ 1y1 Gas cylinder 1 shutoff valve Y107/ 1y2 Gas cylinder 2 shutoff valve Y107/ 1y3 Gas cylinder 3 shutoff valve


Natural gas drive

The gas cylinders must be replaced after 20 years at the latest. The gas system is regularly inspected as part of the gas system check (GAP) during the main inspection (HU) (e.g. visual inspection of tanks, leak check on gas lines). The nominal pressure of the gas cylinders is 200 bar. Each individual gas cylinder is tested with a test pressure of 300 bar and has a design bursting pressure of more than 600 bar.

The gas cylinders are accommodated in sturdy brackets. The standard fuel tank for gasoline retains its full volume of 54 liters.

n i a r t e v i r D

A meltable seal and a flow rate limiter prevent the gas cylinders from exploding in extreme situations. Each gas cylinder can also be mechanically locked via a manual shutoff valve.

P07.54-2058-00

Front gas cylinders 4 Gas cylinder 4 5 Gas cylinder 5

Y107/ 1y4 Gas cylinder 4 shutoff valve Y107/ 1y5 Gas cylinder 5 shutoff valve


51

n i a r t e v i r D

Natural gas drive Filler connection The filler connection with integrated check valve is located behind the fuel filler flap and provides a connection between the gas filling station connection and the gas cylinders. Depending on the type of filling station and amount of gas remaining in the cylinders, it takes between 40 s and 5 min to refuel the gas cylinders. When the vehicle is fueled quickly, the gas in the cylinders heats up. Accordingly, temperature compensation is carried out at modern natural gas filling stations depending on the outside temperature and the total quantity of gas added.

The refueling procedure produces an unfamiliar noise which can be heard around the vehicle. This is part of the system design and is caused by the high flow rate of the gas The maximum possible tank filling pressure – and thus the range of the vehicle – is heavily dependent on the performance of the gas refueling station. A filter i n the filler connection cleans the gas of particles (> 40 µm) to prevent contamination of the tank system. The gas fill line is the connection between the filler connection and the T-piece with check valve The gas cylinders are connected to each other via gas lines. The mixture formation system is supplied with natural gas via an additional gas line.

P88.60-2209-00

Tank recess 1 Gas filler connection

52

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2 Tank filler neck (gasoline)


Natural gas drive Vehicle safety in the B 170 NGT BlueEFFICIENCY model The B 170 NGT model with bivalent drive can either be operated on premium gasoline or natural gas. The model has passed all of the relevant crash tests and engineering strength inspections. The gas cylinders (plastic composite material) were tested at a test pressure of 300 bar. The burst pressure is approx. 600 bar. Each of the five gas cylinders is equipped with a safety coupling. The cylinders are automatically locked by an electromagnetic shutoff valve when the vehicle is parked, during gasoline operation and in the event of predefined forces acting on the vehicle during an accident.

Thermally activated safety valves with a melting seal, bursting disks and flow rate limiters prevent the gas cylinders from bursting.

n i a r t e v i r D

Each gas cylinder can be manually shut off for maintenance operations via a manual shutoff valve.

i Note The service life of the gas cylinders is legally limited to 20 years. The gas cylinders must therefore be replaced after 20 years at the latest.

Gas cylinder with safety coupling 1 2 3 4 5 6 7

Gas cylinder safety coupling Electromagnetic shutoff valve Thermally activated safety valve Manual shutoff valve Flow limiter Bursting disk Gas cylinder

P07.54-2062-00

Gas cylinder with safety coupling


53

n i a r t e v i r D

Natural gas drive Variable intake manifold with gas distributor and pressure regulator unit The following components are attached to the gas distribution rail of the variable intake manifold:

The following components are found on the pressure regulator unit:

• Gas low-pressure sensor • Gas temperature sensor • Gas injection valves

• Gas high-pressure sensor • Gas safety shutoff valve • Low-pressure gas shutoff valve (separate component which is installed on the same bracket as the pressure regulator unit)

P07.54-2059-00

View of variable intake manifold from rear 1 2 3 B18/1 B18/2 B50/3

54

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Pressure regulator unit Gas distribution rail Variable intake manifold Gas high-pressure sensor Gas low-pressure sensor Gas temperature sensor

Y106/1 Y106/2 Y106/3 Y106/4 Y107/2 Y107/3

Cylinder 1 gas injection valve Cylinder 2 gas injection valve Cylinder 3 gas injection valve Cylinder 4 gas injection valve Gas safety shutoff valve Low-pressure gas shutoff valve


Natural gas drive Components on gas distribution rail Gas temperature sensor

Gas low-pressure sensor

The gas temperature sensor records the gas temperature in the gas distribution rail and forward this information to the CNG control unit so that the injection quantity can be measured correctly. The NTC resistor installed in the temperature sensor alters its electrical resistance in line with the gas temperature. The resulting changes in signal voltage are evaluated by the CNG control unit.

The gas low-pressure sensor records the system pressure in the low-pressure system. It transmits its signal to the CNG control unit, which monitors the current gas pressure at the low-pressure side. The pressure measuring range of the gas low-pressure sensor is between 0 and 10 bar. Pressures outside this range are evaluated as a fault by the CNG control unit, which then prevents the vehicle from operating in gas operation mode.

n i a r t e v i r D

Gas injection valve When the magnet coil is energized by the CNG control unit, the armature sleeve with an injection molded soft seal is lifted away from the valve seat towards the coil spring. The gas comes out via the four slot-shaped openings of the valve seat. The duration of the actuation depends on the quantity of gas required. The actuation duration is calculated by the ME-SFI [ME] control unit.

P07.54-2061-00

Gas injection valve 1 2 3 4 5

Coil Spring Solenoid armature Valve seat Valve seat diffusor cap


55

n i a r t e v i r D

Natural gas drive Pressure regulator unit The task of the pressure regulator unit is to reduce the high pressure of the gas in the gas cylinders from 200 bar to the system pressure required at the engine intake side of 6.5 bar.

Pressure relief valve If the pressure regulator unit malfunctions, the pressure relief valve is opened as of a pressure of 16 bar, allowing the natural gas to escape into the atmosphere. If the pressure relief valve is actuated, a fault is detected by the CNG control unit and the gas safety shutoff valve is closed.

Pressure regulator unit heater Because the gas loses heat as its pressure is being reduced from the cylinder pressure to 6.5 bar, the pressure regulator unit is fitted with a heating plate which is connected to the heating circuit. This prevents the pressure regulator unit from icing up.

High-pressure sensor The gas high-pressure sensor is screwed into the pressure regulator unit. It records the absolute gas cylinder pressure in the range of 0 to 260 bar and transmits a proportional electrical signal to the CNG control unit. The gas cylinder pressure is displayed in the instrument cluster as the tank fill level.

Gas safety shutoff valve The gas safety shutoff valve separates the gas highpressure circuit from the gas low-pressure circuit. The gas safety shutoff valve is actuated by the CNG control unit. When it is actuated, a duct is opened in the gas pressure regulator between the gas high-pressure circuit and the gas low-pressure circuit. If the CNG control unit detects a system fault or receives a crash signal, the gas safety shutoff valve is closed. In the rest condition (deenergized) the gas safety shutoff valve is closed by an integral spring.

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P07.54-2060-00

Design of pressure regulator unit 1 1a

Pressure regulator unit Pressure relief valve

B18/1 Y107/2

Gas high-pressure sensor Gas safety shutoff valve

A B C

Gas high-pressure inlet Gas low-pressure outlet Heating circuit connections


Natural gas drive Displays on multifunction display (A1p13) of instrument cluster

n i a r t e v i r D

Preselecting/switching operating mode Using the left and right multifunction steering wheel button groups, the driver can switch to the "Vehicle operating mode" menu. Here, it is possible to choose between natural gas and gasoline operating mode. When natural gas mode is selected, a gas cylinder symbol appears in the multifunction display. The switchover only takes place when all of the function conditions are met. This is indicated by the CNG indicator on the tachometer.

P54.32-6145-00

Fill level of gas cylinders The driver can use the left and right multifunction steering wheel button groups to display the available gas quantity.

P54.32-6133-00

Warning and fault messages on multifunction display (A1p13) of instrument cluster Warning message about gasoline operation This warning message is displayed when the driver wants to switch from natural gas operation (gas cylinder symbol) to gasoline operation but there is not enough fuel in the tank for gasoline operation.

P54.32-6135-00


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Natural gas drive

Fault message about gasoline operation This fault message is displayed in the event of a system fault which prevents gasoline operation of the vehicle.

P54.32-6155-00

Warning message about natural gas operation This warning message is displayed when the driver wants to switch from gasoline operation to natural gas operation but there is not enough fuel i n the cylinders for natural gas operation.

P54.32-6140-00

Fault message about natural gas operation This fault message is displayed in the event of a system fault which prevents natural gas operation of the vehicle.

P54.32-6150-00

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ECO start/stop function ECO start/ stop function with belt-driven starter generator As of September 2008, the ECO start/stop function, code (B01), will be available as special equipment for the following models of model series 169 and 245: • A 150 and A 170 with 5-speed manual transmission • B 150 and B 170 with 5-speed manual transmission

On vehicles with the ECO start/stop function, the engine is switched off during idle periods. This temporarily eliminates the consumption of fuel and the emission of exhaust gases and noise.

n i a r t e v i r D

P15.40-2509-00

Location of components for ECO start/ stop function A1 B64 / 1 B79/2 B95 G1 G1 / 7 K19 K57/2 M1/10

Instrument cluster Brake vacuum sensor Transmission neutral position sensor Battery sensor Battery Additional battery Battery decoupling relay Additional battery relay Starter generator

N3 / 10 N10 N72/1s44 N72/1s45 N73 N129 S40 / 3 S40 /5 S62

ME-SFI [ME] control unit SAM control unit AS/IRS OFF switch ECO switch EZS control unit Starter generator control unit Clutch pedal switch Start enable clutch pedal switch ATA [EDW] hood switch


59

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ECO start/stop function Functional principle

Main functions

On vehicles with the ECO start/stop function, the crankshaft is driven by the starter generator via a poly-V belt to start the vehicle.

The ECO start/ stop function consists of the following main functions:

Advantages The use of a belt-driven starter generator has the following benefits: • Reduction of fuel consumption by approx. 6 to 7% • Reduction of CO2 emissions to as low as 139 g/km • Very quiet and quick starting procedure via the starter generator • Reduction in noise pollution when engine is switched off

• Engine stop function • Engine start function • Forced engine start

Engine stop function The engine is switched off by the ME-SFI [ME] control unit when the following function conditions are met: • • • •

Transmission in neutral Clutch not actuated Service brake operated Vehicle speed below threshold value (8 km/ h)

Engine start function Activation The following function requirements must be met for the ECO start/stop function to be activated: • • • •

Engine at operating temperature Battery status OK Outside temperature in a comfortable range Interior temperature close to specified value set on AAC [KLA] control and operating unit, code (580), or comfort AAC [KLA] control and operating unit, code (581) • Indicator lamp in ECO switch must be on • Vacuum in brake booster must be sufficient • Engine hood closed

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The engine is started automatically when the engine was switched off via the engine stop function and circuit 15 is still on. One of the following function conditions must be met for this to take place: • • • •

Service brake not actuated Clutch actuated ECO switch actuated Vehicle speed above threshold value (8 km/ h)

To restart the engine, the ME-SFI [ME] control unit forwards a start signal to the starter generator control unit via the engine compartment CAN. This then actuates the starter generator directly. The starter generator drives the crankshaft vi a the poly-V belt. This starts the engine.


ECO start/stop function Forced start

Components

The forced engine start function is also available as a protection function. The engine is automatically forced to start by the ME-SFI [ME] control unit without any driver intervention if one of the following function conditions occurs:

New components

• Vacuum in brake booster is not sufficient • Indicator lamp in ECO switch is not on • Battery charge level drops below threshold value

n i a r t e v i r D

• Starter generator control unit • Battery sensor on battery • 12 Ah additional battery (absorbent glass mat battery) • 70 Ah battery (absorbent glass mat battery) • Starter generator (replaces alternator) • Battery decoupling relay • Additional battery relay • Hydraulic belt tensioner • ECO switch • Transmission neutral position sensor • Brake vacuum sensor

Modified components

i Note On ECO start/stop vehicles, the starting procedure with the transmitter key still takes place via the starter. The function sequence of the starting procedure remains unchanged.

• • • • • • • • • • •

Wiring harness Clutch pedal switch Start enable clutch pedal switch Modified ME-SFI [ME] control unit Modified SAM control unit Modified instrument cluster Modified poly-V belt Modified refrigerant compressor Modified ATA [EDW] hood switch Water pump and crankshaft belt pulley Water pump bearing

P07.54-2066-00

Data flow chart of engine stop function See next page for legend


61

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P07.54-2065-00

Data flow chart of engine start function

62

1 2 3 4 5 6 7 8 9 10

Brake pedal switch, status Clutch switch, status Engaged gear, status Brake vacuum, status Wheel speed signal Battery, charge status ECO switch, status Starter generator, actuation Additional battery relay, switch request Battery decoupling relay, switch request

B64 / 1 B79/2 B95 G1 M1/10 N3/10

Brake vacuum sensor Transmission neutral position sensor Battery sensor Battery Starter generator ME-SFI [ME] control unit

o

N10 N18 N22 N22/7

SAM control unit HEAT [HAU] control and operating unit AAC [KLA] control and operating unit Comfort AAC [KLA] control and operating unit N47-5 ESP and BAS control unit N72/1 Upper control panel control unit N72/1s45 ECO switch N73 EZS control unit N129 Starter generator control unit S9 /1 Brake light switch S40 / 3 Clutch pedal switch S40/ 5 Start enable clutch pedal switch CAN B CAN C LIN B7 LIN B8

Interior CAN Engine compartment CAN On-board electrical system LIN Climate control LIN



n i a r t e v i r D

P15.40-2507-00

Block diagram of ECO start/stop function A1 B64 / 1 B79/2 B95 K19 K57/2 M1/10 N3/10 N10 N18 N22 N22/7 N47-5

Instrument cluster Brake vacuum sensor Transmission neutral position sensor Battery sensor Battery decoupling relay Additional battery relay Starter generator ME-SFI [ME] control unit SAM control unit HEAT [HAU] control and operating unit AAC [KLA] control and operating unit Comfort AAC [KLA] control and operating unit ESP and BAS control unit

N72/1 N72/1s45 N73 N129 S9 /1 S40 / 3 S40 /5

Upper control panel control unit ECO switch EZS control unit Starter generator control unit Brake light switch Clutch pedal switch Start enable clutch pedal switch

CAN B CAN C LIN B7 LIN B8

Interior CAN Engine compartment CAN On-board electrical system LIN Climate control LIN


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ECO start/stop function Components of ECO start/stop function

P15.40-2510-00

K19

Battery decoupling relay

Starter generator control unit (N129) The starter generator control unit is located in the underfloor next to the battery box and has the following tasks: Starter mode: • Supply the stator coil of the starter generator with 3-phase AC voltage by means of periodic conversion of the 12 V DC voltage coming from the battery in the inverter modules of the starter generator control unit Alternator mode: • Preexcitation of the rotor coil of the starter generator with 12 V DC voltage from the battery • Rectification of the 3-phase AC voltage from the stator coil of the starter generator using active semiconductors within the starter generator control unit

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N129

Starter generator control unit

i Note Rectification of the three sinusoidal oscillations offset at 120° produces a rectified but slightly wavy alternator voltage which is smoothed out further by the battery connected in parallel to the starter generator and the capacitors in the onboard electrical system.

Battery decoupling relay (K19) The battery decoupling relay is located in the underfloor next to the starter generator control unit. Its task is to disconnect the on-board electrical system from the battery when the engine is started. The battery thus only supplies the electrical starter circuit with energy during the starting procedure. At the same time, the additional battery supplies the onboard electrical system with energy.



n i a r t e v i r D

P15.40-2512-00

Components of starter generator (M1/10) 1 2 3 4

Belt pulley Stator Rotor Housing

5 Sensor with electrical connection 6 Carbon brush bracket 7 Rear cover with electrical connection

Task of starter generator The starter generator is driven by a poly-V belt and supplies sufficient energy to the on-board electrical system at all engine speeds occurring during driving operation. It is thus responsible for maintaining the power supply to the on-board electrical system and charging the battery. In addition, it performs the task of the starter when the engine is at operating temperature.

A starter generator position sensor is fitted to the rotor to monitor its position and rotational speed.

Design of starter generator

• A shared connection for the three 3-phase lines (U, V, W) of the starter generator control unit • A connector for the sensor lines to the starter generator control unit • A connection for the excitation lines of the starter generator control unit

The belt-driven starter generator is a 3-phase synchronous motor with a claw-pole design. The stator of the starter generator is equipped with a 3-phase winding. The rotor consists of a rotor winding positioned concentrically to the rotor axis which is surrounded by claw poles. These form the north and south poles of the ferromagnetic circuit on an alternating basis. Sli p rings are used to excite the rotor winding.

Air deflector shields are fitted to the rotor to improve the ducting of the cooling air within the starter generator. The belt-driven starter generator has the following connections:


65

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ECO start/stop function Battery sensor (B95) The battery sensor forms part of the on-board electrical system management. It is installed directly on the negative terminal of the battery and records the voltage, the current and the temperature at the battery. The battery charge level is determined based on the measured values.

P54.10-2964-00

B95

Battery sensor

1 2 A9 M1/10

Crankshaft pulley Belt tensioner Refrigerant compressor Starter generator

Belt drive The belt tension is particularly important because of the continuous changes in load during start/stop operation. For this reason, a hydraulic spring damper element supported against the cylinder crankcase is installed as a belt tensioner. The belt tensioner is hinge-mounted so that it can transfer tensioning forces to the belt drive. The following modifications have also been performed: • Wider poly-V belt with 6 grooves • Greater belt tension due to the use of a hydraulic belt tensioner • Belt path has been changed to better enclose the belt pulley of the crankshaft • Use of reinforced bearings on coolant pump, starter generator and refrigerant compressor

P13.20-2060-00

i Note The belt tensioner may only be released and tightened using the specified special tool. When being released, the belt tensioner may only be pressed together very slowly to prevent damage (T > 20 s). If it is pressed together quickly, hydraulic pressure compensation cannot take place and the belt tensioner will be irreparably damaged.

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n i a r t e v i r D

P15.40-2511-00

G1 /7

Additional battery

K57 /2 Additional battery relay

Additional battery (G1/7)

Additional battery relay (K57/2)

The additional battery is located behind the trunk lining on the right-hand side.

The additional battery relay is located next to the additional battery behind the trunk lining on the right-hand side. Its task is to connect the additional battery to the on-board electrical system during the starting procedure and for charging. The relay has a soundinsulated housing to keep the switching noises down to a comfortable level.

It supplies the on-board electrical system with energy during starting procedures. This prevents current fluctuations which would be seen as a comfort impairment by the driver.

Clutch pedal switch (S40/3) Actuation of the clutch pedal is detected via the clutch pedal switch.

Start enable clutch pedal switch (S40/5) The start enable clutch pedal switch detects that the clutch pedal is fully actuated and thus that the drivetrain is disengaged.

P25.19-2011-00

S40/ 3 Clutch pedal switch S40/ 5 Start enable clutch pedal switch


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P00.19-4450-00

B64/1 B79/2

Brake pressure sensor Transmission neutral position sensor

S62

ATA [EDW] hood switch

ATA [EDW] engine hood switch (S62)

Brake pressure sensor (B64/1)

The engine hood switch is located in the area of the engine hood catch and has a dual switch design. The switches have a redundant design so that engine hood opening can be reliably detected. Both switches prevent the engine from starting automatically when the engine hood is open. Both signals are read in and processed by the SAM control unit. One of the switches is also used to activate the ATA [EDW].

The brake pressure sensor is located on the vacuum line and measures the vacuum. The signal is forwarded to the ME-SFI [ME] control unit.

Transmission neutral position sensor (B79/2) The transmission neutral position sensor is located in the shift module. It detects the transmission neutral position.

ECO switch (N72/1s45) The ECO switch is located in the upper control panel control unit. The ECO start/stop function can be deactivated (integrated LED off) and reactivated (integrated LED on) by pressing the ECO switch. The status of the ECO switch is processed by the ME-SFI [ME] control unit.

P54.25-6932-00

N72/1s45 ECO switch

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ECO start/stop function Instrument cluster displays On vehicles with ECO start/stop function, additional messages can be displayed on the multifunction display of the instrument cluster: • • • •

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"ECO" "ECO" displa displayy with with engine engine stopp stopped ed Prompt Prompt to chan change ge gear gear to "N" "N" Promp Promptt to to shi shift ft up Promp Promptt to to shi shift ft down down

P54.32-6218-00

ECO indicator

P54.32-6221-00

Prompt to shift up

P54.32-6219-00

Prompt to change gear to N

P54.32-6220-00

Prompt to shift down


69

s i s s a h C

Brake system HILL START ASSIST The HILL START ASSIST function has been introd uced to the A-Class and B-Class as standard to make starting off on slopes easier and prevent the vehicle from rolling backwards. The HILL START ASSIST function is implemented by the ESP and BAS control unit. The software in the ESP and BAS control unit has been adjusted for this purpose.

Function The HILL START ASSIST function causes the traction system hydraulic unit to maintain the brake pr essure, which was built up via the brake pedal and which is required to hold the vehicle in place, for a short period of time after the driver releases the brake pedal. The preprogrammed holding time of 1 second is designed to give the driver enough time to comfortably switch from the brake pedal to the accelerator pedal without the vehicle rolling back unintentionally. When the driver actuates the accelerator pedal, the brake pressure holding time is extended until the drive torque available at the drivetrain is sufficient for the vehicle to start off without rolling backwards.

Activation of the function The function is activated automatically if the following function requirements are met: • Vehic Vehicle le is sta statio tiona nary ry • A slope slope in the the directio direction n of travel travel is detecte detected d The upward or downward slope is calculated based on the longitudinal acceleration signal from the yaw rate sensor for lateral and longitudinal acceleration while the vehicle is at a standstill.

i Note The HILL START ASSIST function is not activated when driving on the flat or downhill.

Aborting the function The HILL START ASSIST function is aborted as soon as one of the following function conditions occurs: • Hand Hand bra brake ke is is actu actuat ated ed • Engi Engine ne is shut shut off off • Transm Transmiss ission ion is shift shifted ed to neutra neutrall (only vehicles with CVT transmission) • A gear change is made made from a forward forward gear to a reverse gear or vice versa

i Note If the driver does not actuate the accelerator pedal after releasing the brake pedal, the brake p ressure is quickly released after one second.

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Brake system

s i s s a h C

P42.45-2698-00

Data flow chart of HILL START ASSIST function 1 2 3 4 5 6 7 8 A7/3b1 B24/1 B24/15 5

Wheel speed, signal Accelerator pedal sensor, signal Selector lever position, status Yaw rate sensor for lateral and longitudinal acceleration, signal Brake pressure, signal Engine torque, signal Brake light switch, status Parking brake indicator switch Brake pressure sensor Yaw Yaw rate rate sens sensor or for for later lateral al and and longit longitud udina inall acceleration

B37 L6/1 L6/2 L6/3 L6/4 N3/9 N3/10 N15/ N15/5 5 N47-5 S9/1 S12

Accelerator pedal sensor Left front rpm sensor Right fr front rpm se sensor Left rear rpm sensor Right rear rpm sensor CDI control unit ME-SFI [ME] ME] con conttrol unit Elect Electron ronic ic sele select ctor or leve leverr modu module le cont control rol unit unit ESP an and BA BAS co control un unit Brake light switch Parking brake indicator switch

CAN C CAN H

Engi ngine compar mparttment CAN Sensor CAN


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n g i s e D

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e l u ) t t d i i S o n n E ( u u m n n t l l i t o o o r ) ) n g i e o l n e n r r N 2 2 u i u t n t n r v e e u 2 2 l A d n n e e x x l l 7 7 o e C r o o o i i o r n n r t r ) c c t t e m B B s t o s n t o o ) ) n t p p n t i r t n i e 4 ) 4 ) c i t ) i o i e s s s o s n c e n s n m n e c i m t m t l e s u 1 1 i i l i i a a w m u u g u u l 6 6 ] n l e t l m S o t l l ( n ( n i l n t m d d s r c u u E A o i i t o o g o e a e p a e p c n s r s B p a n r c n r l n M i n n t t e e t d p e n g n e [ e h d u u a a a n n d h o o m m n l I c l r r l F i m m o n o i o n o c c t t a a l i o n n r r l l e c h a t o o u c r r r t o o h o h s S t h t d d e c c r I s c t t t t t P c T i n n S e a a n i i i e i E a s e e e n Z t D d g e w e e w e l o w V w S l n c n I E S C ( M ( X ( h X ( h E c ( C ( E E o i g 1 5 6 7 8 9 0 1 2 3 4 n 2 2 2 2 2 E 1 1 1 1 1

) s h s d ) ) h 5 n 2 e i w t t w t n 1 i 3 a 1 e d i o w o ) 8 n i ( o t w o d 2 y d ( t i t 1 5 ( d 5 t c ) u o a ( ( n n c i n i i 5 l t e l i s c i e u n w d e e D h 5 o d n p s t n w ( t r l u u n s d h i d o t a o r i o V w a u r l r o r e m t i c l y o n l c i d r l e o e o c D ( p p d t a , o w h e r a m c o w r ( ) t t w t t n o r o r s h i r h w t h o ) o o s c n r g t c t o t i s o y i h w t n n i i t a i i p o p t c n e - i n t o a c s t r ( t s n h t s o i c w i w c a r r c r c a t t ( w p c w e u ( s a i m n o i s i t t i a r r c e r o l o t m u s t m n m S u n t h r w i n e e l i o ) t i ( r ) o r u A o o o R o o s l P o C c e p n o R n r t o d g a r / y l ] t c o t / l o A u u n e t t o u A d ) ) k ] n i d t d ) l s r o i a n r i c ) t n D r D ) c n a A W r 4 r a t n r ) a 4 ) i l g t n W i o a t e t o u t n t 8 s D o s f r N e N e l N r n n n c o P n r r D l l a 8 i o i t r r e i E c o e E 5 5 e o o E a c o t o t T n f A m r r ( ( r o [ e o r o o A A r i e g h ) f f ) a [ r f r r r t t e t c e C u t v o r M t M n c 5 t r m d t t i l 0 i e d h e o A i t h t m M t d s t A e r t S n n n d d a f f 5 T c e g a O o O h e e A o p o o T o i e o 2 g i o 2 l 4 r o n T o s r 2 A 5 n i I C c C c E ( R S C o C c A p c A ( T ( P A L R L c ( R c ( r e t 1 2 3 4 5 6 7 8 9 0 1 2 3 n 1 1 1 1 I


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On-board electrical system Model series 169 and 245 without code (B01) ECO start/stop function The goal of on-board electrical system management is to assure a positive charge balance in the battery so that the vehicle can be started at any time. The load state of the on-board electrical system is compared against defined characteristics and suitable measures are implemented where necessary. These include, for example: • Different charging voltage specifications for the alternator • Rpm increases during engine idle • Reduction of the output of individual convenience consumers

To allow the vehicle to remain idle for long periods, the load on the battery from the quiescent current must be as low as possible. In addition to the optimization of individual components, two other measures have been introduced: decentralized power management and a quiescent current switch. Decentralized power management is integrated into all control units as a standard software module and prevents undesirable control unit activity when the vehicle is parked. The quiescent current switch is a bistable relay that is opened by the on-b oard electrical system management when the vehicle is idle and the run-on time has elapsed. All control units that are not needed when the vehicle is idle are disconnected from the battery. This further minimizes the quiescent current demand.

P47.10-2446-00

On-board electrical system components, shown on B-Class A1 B95 G1 G2

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Instrument cluster Battery sensor Battery Alternator

N3 /9 N3/10 N10 N73

CDI control unit ME-SFI [ME] control unit SAM control unit EZS control unit


On-board electrical system Model series 169 and 245 with code (B01) ECO start/stop function On vehicles with the ECO start/ stop function, an additional battery is installed to support the on-board electrical system during the starting procedure. The following components have been added compared to the standard vehicle: • Larger on-board electrical system battery with absorbent glass mat design and an output of 70 Ah • Additional battery with absorbent glass mat design and an output of 12 Ah • Intelligent battery sensor • Battery cutoff relay

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The two batteries can be coupled whenever this is necessary for the vehicle to operate properly. This involves connecting the battery and additional battery in parallel. The electric circuits are separate primarily in order to safeguard the starting ability of the vehicle. For this reason, other consumers are only allowed to consume energy under certain conditions. The two electric circuits are coupled and decoupled via a battery cutoff relay. The on-board electrical system is coordinated by the SAM control unit.

The battery sensor determines the charge state of the battery. Absorbent glass mat batteries are used because of the frequent charge and discharge cycles.

P15.40-2508-00

On-board electrical system components, shown on B 170 with code (B01) ECO start /stop function A1 B95 G1 G1 / 7 K19

Instrument cluster Battery sensor Battery Additional battery Battery decoupling relay

K57/2 M1/10 N3/10 N10 N73 N129

Additional battery relay Starter generator ME-SFI [ME] control unit SAM control unit EZS control unit Starter generator control unit


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Instrument cluster

P54.30-9763-00

Instrument cluster on A 200 CDI A1 A1e1 A1e2 A1e3 A1e4 A1e7 A1e9

Instrument cluster Left turn signal indicator lamp Right turn signal indicator lamp High beam indicator lamp Fuel reserve indicator lamp Brake fluid and parking brake warning lamp Seat belt warning lamp

A1e15 A1e16 A1e17 A1e31 A1e33 A1e41

Airbag indicator and warn ing lamp Preglow indicator lamp (with diesel engine) ABS indicator lamp CNG indicator lamp (B 170 NGT) LIM function indicator lamp (variable speed limiter) ESP warning lamp

Legend continued on next page

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Instrument cluster

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P54.30-9762-00

Instrument cluster on B 170 NGT BlueEFFICIENCY A1e54 A1e58 A1e66 A1p1 A1p2 A1p4 A1p5

Coolant temperature warning lamp Engine diagnosis indicator lamp Tire pressure monitor warning lamp Coolant temperature display Fuel level and reserve indicator Outside temperature indicator Tachometer

A1p6 A1p8 A1p12 A1p13 A1p16 A1p18 A1r1

Electronic clock Electronic speedometer Gear indicator Multifunction display Transmission mode display Gas operation display (B 170 NGT) Instrument illumination brightness control and reset button


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Exterior lights Front lights

A-Class

With the model refinement of model series 169 and 245, the "Exterior lights shutoff" function is now available. With this function, the low beams are switched off if the ignition is switched off while the low beams are still on. If the transmitter key is then removed from the ignition lock or the door is opened, the standing lights are also switched off. An acoustic warning message is no longer output. The standing lights can be reactivated with the ignition off by turning the rotary light switch to the standing lights position.

In combination with the redesign of the body shape in the area of the front bumper, the lamp units have also been modified. Halogen reflector headlamps are installed in the A-Class as standard. Bi-xenon headlamps with projection technology and cornering illumination are available as special equipment. On vehicles with cornering illumination, the cornering illumination function is no longer performed by the front fog lamps but by the new lamp units. On vehicles with halogen headlamps, the high beam function is performed by a separate halogen headlamp installed in the lamp unit in place of the cornering illumination component.

P82.10-5153-00

Shown on A 200 ELEGANCE with bi-xenon headlamps, code (614) E1 E1e1 E1e2 E1e3

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Left front lamp unit Left high beam Left low beam Left standing and parking lamp

E1e5 E1e9 E5 / 1

Left turn signal light Left cornering illumination (activated depending on national version) Left front fog lamp


Exterior lights B-Class The lamp units of the B-Class are equipped with halogen projection headlamps as standard. Bi-xenon headlamps with projection technology, active curve illumination and cornering illumination are available as special equipment. On vehicles with cornering illumination, this function is performed via the lamp units as previously.

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On vehicles with halogen headlamps, the high beam function is performed by a separate halogen headlamp installed in the lamp unit in place of the cornering illumination component.

P82.10-5154-00

Shown on B 200 with bi-xenon headlamps, code (615) E1 E1e1 E1e2 E1e3

Left front lamp unit Left high beam Left low beam Left standing and parking lamp

E1e5 E1e9 E5 / 1

Left turn signal light Cornering illumination (activated depending on national version) Left front fog lamp


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Exterior lights Rear lamps of A-Class and B-Class

P82.10-5155-00

Shown on A 200 E4 E4e1 E4e2

Right taillamp Right turn signal light Right taillight, parking light and rear fog light

E4e3 E4e10

Right backup light Right brake light and taillight

P82.10-5156-00

Shown on B 200 E4 E4e1 E4e2 E4e4

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Right taillamp Right turn signal light Right taillight and parking light Right brake light

E4/1 Right rear-end door taillamp E4/1e3 Right backup lamp E4/1e5 Right rear fog light


Exterior lights Adaptive brake lights

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To optimize rearward signaling, the brake lamps flash in the event of an emergency brake application. The function requirements for this are: • Brakes applied • Vehicle speed > 50 km/ h • Brake Assist active or vehicle deceleration > 7.5 m/s 2 or heavy brake application with high brake pressure and ABS control • Hazard warning flasher not manually activated The preconditions are registered by the ESP and BAS control unit. An emergency braking signal is generated from the data and output on the engine compartment CAN. The signal is registered by the EZS control unit and relayed over the interior CAN to the SAM control unit. The SAM control unit receives the signal and actuates all brake lights for the duration of the emergency braking signal. The adaptive brake lights pulse at a frequency of 3 Hz to ensure that following vehicles are aware of an emergency brake application even earlier. If the vehicle comes to a stop after such a brake application, the flashing brake light function is canceled and the brake lights are actuated continuously again. If the vehicle speed before the emergency brake application was over 70 km/h, the hazard warning flasher is automatically switched on once the vehicle reaches a standstill. The hazard warning system is deactivated when the vehicle accelerates back above 10 km/h.

P82.10-5157-00

Flashing brake light actuation, shown on B-Class 1 2

Request for flashing brake lights Actuation of flashing brake lights

A7 /3 N10 N47-5 N73

Traction system hydraulic unit SAM control unit ESP and BAS control unit EZS control unit

CAN-B CAN-C

Interior CAN Engine compartment CAN


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Exterior lights 0 0 0 6 1 5 0 1 . 2 8 P

) 5 1 6 ( e d o c , n o i t a n i m u l l i e v r u c d e t a r g e t n i d n a s p m a l d a e h n o n e x i b h t i w 5 4 2 l e d o m n o n w o h S

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Outside mirrors New outside mirrors With the model refinement, the outside mirrors have been completely redesigned. The outside mirrors are now painted in the vehicle color on all A-Class and B-Class models. The turn signal lamps integrated into the side have been redesigned and now feature LED/fiber optic technology. The mirror surface has been enlarged to meet legal requirements. The heat output of the outside mirrors has been adjusted to the larger mirror surface area.

P88.70-2513-00

Redesigned outside mirror E6 /5

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Left outside mirror turn signal lamp

M21 /1

Left electrically adjustable and heated outside mirror


Power windows Power window control With the model refinement of the A-Class and B-Class, the one-touch automatic window closing function, which was previously a special equipment option (SA), is now available as standard in all models.

In combination with this change, the comfort opening/closing system now also forms part of the basic equipment on the three-door A-Class version. On the five-door models of the A-Class and B-Class, this comfort function is still only available in combination with the rear power windows (2 doors) special equipment, code (584).

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P72.29-2661-00

Block diagram of power windows, shown on ECE version M10/3 M10/4 M10/ 5

Left front power window motor Right front power window motor Left rear power window motor (with code (584) Rear power windows (2 doors)) M10/ 6 Right rear power window motor (with code (584) Rear power windows (2 doors)) M14/ 5s1 Right front door rotary tumbler microswitch M14/ 6s1 Left front door rotary tumbler microswitch N69/1 Left front door control unit N69/2 Right front door control unit N69/ 3 Left rear door control unit (with code (584) Rear power windows (2 doors)) N69/ 4 Right rear door control unit (with code (584) Rear power windows (2 doors)) N73 EZS control unit

S20/1 S21/2

S21/3 S21/4

CAN B CAN C LIN B1

Driver power window, outside mirror adjustment and CL [ZV] switch group Passenger-side power window switch (without code (460) Canada version) Passenger-side power window and CL [ZV] switch group (on model 245.2 with code (460) Canada version) Left rear power window switch (with code (584) Rear power windows (2 doors)) Right rear power window switch (with code (584) Rear power windows (2 doors)) Interior CAN Engine compartment CAN Front door LIN


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Active Park Assist incl. PARKTRONIC System in general With the model refinement of the A-Class and B-Class, Active Park Assist, code (235), is available as special equipment for the first time and the PARKTRONIC (PTS) system is included additionally. Like the familiar PARKTRONIC system, Active Park Assist operates using ultrasonic sensors. Active Park Assist helps the driver to find a sufficiently large parallel parking space and then park the vehicle comfortably in the space.

Ultrasonic sensors are used to scan the road for parallel parking spaces, which are then suggested to the driver. Once a parking space has been found, the system controls the steering maneuver by actuating the electric steering actuator. The driver remains responsible for determining the acceptability/plausibility of the parking space found by the system and also controls the longitudinal movement of the vehicle via the accelerator pedal and brake pedal.

P54.65-3601-00

Monitoring range of ultrasonic sensors of Active Park Assist incl. PARKTRONIC (schematic)

A Actuation of both side sensors for parking space search

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B Actuation Actuation of the ten ten sensors sensors for PARKTRON PARKTRONIC IC func- func- tionality


Active Park Assist incl. PARKTRONIC Ultrasonic sensors

Function sequence

On vehicles with Active Park Assist, the outer left and right front ultrasonic sensors are not just used for the PARKTRONIC function, they also scan the road for potential parallel parking spaces. The two outer sensors therefore change their sensing range according to requirements.

The Active Park Assist function does not have to be activated. At vehicle speeds of up to 35 km/h, the outer ultrasonic sensors in the front bumper always operate in the background to scan the road for parking spaces on both sides, to the left and right of the vehicle. The parking spaces that are found are stored over a distance of approx. 15 m.

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At low speeds, the symbol "P" is displayed on the multifunction display of the instrument cluster to indicate that the system is searching for parking spaces. When a parking space is found, an arrow indicates the side of the road on which the parking space is located.

i Note By default the system only indicates parking spaces on the passenger-side of the vehicle. To have parking spaces on the driver side indicated as well (e.g. on one-way streets), the driver must actuate the turn signal towards the driver side.

P54.65-3614-00

B8/1 B8/2 B8/3

Oute Outerr lef leftt fro front nt PTS PTS ult ultra rassonic onic senso ensor r Cent Center er left left front ront PTS PTS ult ultra rassonic onic sens sensor or Inne Innerr lef leftt fron frontt PTS PTS ultra ltraso soni nic c se sensor nsor

The Active Park Assist function detects parallel parking spaces based on the following criteria: The space must be parallel to the road, must be at least 1.3 m longer than the vehicle, may not be longer than 10 m and must be at least 1.5 m wide.


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Active Park Assist incl. PARKTRONIC i Note

i Note

The system only detects free spaces based on whether the vehicle would fit in the space. It cannot detect whether or not the free space is actually a parking space.

The Active Park Assist function is aborted if the vehicle speed exceeds exceeds 10 km/ h during parking or if the driver intervenes in the steering maneuver while the vehicle is being parked.

If the driver stops and engages the reverse gear after driving past a suitable parking space, the following message is first displayed on the multifunction display of the instrument cluster: • "Activa "Activate te Park Park Assist Assist?" ?" "Pay attention to your surroundings" Confirm with "Yes" or "No" using the buttons on the multi function steering wheel The parking maneuver supported by the Active Park Assist function is started once the system warning messages have been confirmed on the instrument cluster. The following message appears next: • "Par "Park k Assi Assist st act activ ive" e" "Accelerate and brake yourself" The driver now removes his/her hands from the steering wheel and only has to carefully actuate the accelerator and brake pedals until the final position is reached. Additional maneuvering may be required. The following message then appears:

The lateral boundary of the parking space (width) is determined based on a detected obstacle (e.g. a curb). If no obstacle is detected at the side, the vehicle is aligned based on the obstacle in front (vehicle). In this case, the parking angle is determined by the direction of travel as the vehicle moved past the parking space.

i Note While maneuvering, the multifunction display displays the following instructions to the dri ver, if necessary: • "Please "Please engage engage forwar forward d gear" gear" or • "Please "Please enga engage ge rever reverse se gear" gear"

• "Parkin "Parking g assist assistanc ance e complet complete" e" "Take over control"

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P54.65-3600-00

Block diagram of Active Park Assist incl. PARKTRONIC A1 A44 /1 A44 /3 A91 B8/1 B8/2 B8/3 B8/4 B8/5 B8/6 B8/7 B8/8 B8/9 B8/10 B38/2 L6 / 1 L6 / 2 L6 / 3 L6 / 4 N10 N15/ 5

Instrument cluster Driver side instrument panel PTS warning indicator Rear dome lamp PTS warning indica tor Electromechanical controller unit (ES) Outer left front PTS ultrasonic sensor Center left front PTS ultrasonic sensor Inner left front PTS ultrasonic sensor Inner right front PTS ultrasonic sensor Center right front PTS ultrasonic sensor Outer right front PTS ultrasonic sensor Outer right rear PTS ultrasonic sensor Inner right rear PTS ultrasonic sensor Inner left rear PTS ultrasonic sensor Outer left rear PTS ultrasonic sensor Rain/light sensor (with code (U58) Exterior light & vision package) Left front rpm sensor Right front rpm sensor Left rear rpm sensor Right rear rpm sensor SAM control unit Electronic selector lever module control unit (with transmission 722)

N18

HEAT [HAU] control and operating unit (without code (580) Automatic air conditioning and without code (581) Comfort automatic air conditioning) N22 AAC [KLA] control and operating unit (with code (580) Automatic air conditioning) N22/7 Comfort AAC [KLA] control and operating unit (with code (581) Comfort automatic air conditioning) N28/3 Trailer control unit (with code (550) Trailer hitch) N47-5 ESP and BAS control unit N62 PTS control unit N68 Electrical power steering (ES) control unit N70 Overhead control panel control unit N72/1 Upper control panel control unit N72/ 1s8 PTS OFF switch N73 EZS control unit N80 Steering column module S1 Rotary light switch S12 Parking brake indicator switch S16 / 2 Backup light switch (with transmission 711, 716) CAN B CAN C LIN B8

Interior CAN Engine compartment CAN Climate control LIN


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Audio and communication Audio 5 Basic equipment: • • • • •

Monochrome display Radio CD player (audio) MP3 capability AUX IN jack in glove compartment

Special equipment: • Speaker system (with center speaker and bass box) (only ECE)

P82.60-6366-00

A2

Radio

A2

Radio

Audio 20 Basic equipment: • • • • • •

5" color display screen Radio with twin tuner CD player (audio) Bluetooth capability MP3 capability AUX IN jack in glove compartment

Special equipment: • Speaker system (with center speaker and bass box) (only ECE) • CD changer (audio) • Digital radio reception (DAB) (only GB and in combination with CD changer) • Comfort telephony • Sirius satellite radio (only model 245, Canada version) • Sound system (Harman/ Kardon) (only in combination with CD changer)

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P82.60-6367-00


Audio and communication Audio 50 APS

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Basic equipment: • • • •

5" color display screen 3-band radio tuner DVD player (audio) DVD arrow navigation with map display in the area of intersections • Bluetooth capability • MP3 capability • AUX IN jack in glove compartment

Special equipment • Speaker system (with center speaker and bass box) (only ECE) • DVD changer (audio) with LINGUATRONIC • Digital radio reception (DAB) (only GB) • Comfort telephony • Sound system (Harman/ Kardon)

P82.61-3982-00

A2 /56

Radio and navigation uni t

A40 /3

COMAND operating, display and con troller unit

COMAND/ COMAND APS COMAND basic equipment: • • • • • • •

6.5" color display screen 3-band radio tuner DVD player (audio/video) Slot for SD memory cards Bluetooth capability MP3 capability AUX IN jack in glove compartment

COMAND APS additional equipment • Hard disk map navigation • LINGUATRONIC • MusicRegister P82.86-8145-00

Special equipment • Speaker system (with center speaker and bass box) (only ECE) • DVD changer (audio/video) • Digital radio reception (DAB) (only GB) • Comfort telephony • Sound system (Harman/ Kardon)


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Audio and communication New Telematics Generation (NTG) 2.5 NGT 2.5 features a new display and operating concept as well as new functions. In contrast to models 204, 216 and 221, where the controls and display elements are separated from each other, on model series 169 and 245 they are still grouped together in the audio unit in the center console. For the NTG 2.5, the following audio units are installed in the vehicle depending on the national version:

For the ECE market • Audio 20 • Audio 50 APS • COMAND APS

For the Canadian market (B-Class only) • Audio 20 with integrated CD changer

For the Japanese market • COMAND

The NTG 2.5 audio units incorporate the following significant innovations: • New operating structure • High resolution 5" display (with Audio 50 APS and Audio 50 APS with DVD changer) • High resolution 6.5" display with 800 x 480 pixels (with COMAND and COMAND APS) • New colors and graphics, based on model series 204, 216 and 221 • Diversity tuner (with Audio 50 APS, COMAND and COMAND APS) • Bluetooth hands-free system • Improved LINGUATRONIC voice control system (VCS) (Audio 50 APS with DVD changer and COMAND APS) • 4 GB MusicRegister in COMAND APS for storing up to 1,000 audio files • Components which were previously located in separate positions, such as the CD/DVD changer, Bluetooth control unit, voice control module, navigation module and audio gateway, have been integrated into the COMAND APS Thanks to the integration of the CD/DVD changer, the stowage space in the glove compartment can now be used for other purposes.

i Note

New functionality

In addition to the new NTG 2.5 audio units, the familiar Audio 5 unit is also available

With the introduction of the NTG 2.5, the new audio and communications systems feature the following functions depending on the equipment installed: • • • • • •

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Navigation Telephony Entertainment Media interface Sound system LINGUATRONIC voice control system (VCS)


Audio and communication Navigation The navigation function on vehicles with Audio 50 APS and COMAND APS is now significantly quicker because the system only uses DVDs and the hard disk. The larger data memory also makes it possible to provide additional information in the vehicle. For example, the Audio 50 APS is, for the first time, capable of displaying detailed information on the road situation at junctions by means of an intersection zoom function. The COMAND APS controller unit is also able to display lane guidance. This allows the driver to see precisely which lane he/she needs to drive along to follow the route calculated by the system on freeway exit ramps. In addition, other important information such as gas stations along the route is displayed as symbols on the map.

Telephony

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Basic telephony via Bluetooth interface During Bluetooth operation, the mobile phone is not connected to the external vehicle antenna and is not recharged. Telephone book entries can be transferred to the audio unit via the business card transfer function.

Comfort telephony via universal interface The universal interface is located in the center console and connects the mobile phone to the vehicle via a suitable cradle. Integrating the mobile phone into the on-board electrical system via the cradle has the advantage that the external vehicle antenna can be used and the battery of the mobile phone can be recharged by the on-board electrical system. Operating the phone via the universal i nterface allows the telephone book to be transferred to the audio unit. The entries can be downloaded both from the memory of the mobile phone and from the SIM card.

On vehicles with basic telephony, suitable mobile phones can be connected to the audio system of the vehicle via the Bluetooth interface installed as standard and on vehicles with comfort telephony, code (386), they can be connected via a universal interface. With both variants, the mobile phone can be operated using the multifunction steering wheel and the buttons on the audio unit.

i Note For more information about Bluetooth telephony and comfort telephony, see the following website: www.mbusa-mobile.com


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P82.70-6722-00

Block diagram of telephony A1 A2 A2 /18 A2 /34 A2 /56 A2 /91 A34 /7 A34 /15 A40 /3 B25 H4 / 1 H4 / 2 H4 / 3 H4 / 4 H4/27 H4/29 H4/33 H4/34

Instrument cluster Radio Antenna amplifier Central locking antenna (Japan version) Radio and navigation unit Bluetooth antenna Bluetooth module (ECE and Canada version) Universal Portable Cell Phone Interface (accessories) (ECE and Canada version) COMAND operating, display and control ler unit Hands-free system microphone Left door speaker group Right door speaker group Left rear door speaker Right rear door speaker Center cockpit speaker (centerfill) (with code (810) Sound system) Subwoofer speaker (with code (810) Sound system) Left A-pillar tweeter Right A-pillar tweeter

H4/54 H4/57 N40/3 N73 N80 N123/3 S93 /2 S110 S111 X39/37

AKM

Mobile phone adapter cable (accessories) (Japan version)

A B

Networking on ECE and Canada version Networking on Japan version

CAN B LIN E1

Interior CAN Steering LIN (with code (428) Steering wheel shift buttons) Media Oriented System Transport

MOST

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Left rear surround speaker (with code (810) Sound system) Right rear surround speaker (with code (810) Sound system) Amplifier for sound system (with code (810) Sound system) EZS control unit Steering column module Telephone control unit, Japan (Japan version) VCS switch Left multifunction steering wheel button group Right multifunction steering wheel button group Cell phone separation point (Japan version)


Audio and communication Entertainment The NTG 2.5 audio units can also receive DAB digital radio (GB) and are MP3-capable. In addition, the Audio 20 radio is able to receive Sirius satellite radio (Canada). The COMAND controller unit also supports DVD video playback. The COMAND and COMAND APS are equipped with a slot for SD memory cards and are also available as special equipment with a 6-disk DVD changer. The SD memory card allows the new MusicRegister functions including Compact Disc Database (CDDB) to be used. SD storage media can be connected to the COMAND and COMAND APS via the SD memory card slot and audio files can then be transferred to the hard disk.

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On the ECE version, the MusicRegister allows music files to be copied. On the Japan version, music files and compressed audio files can additionally be opened and selected directly. These files can be transferred directly to the hard disk of the COMAND units from a CD, DVD or SD memory card. With the functionality of the Compact Di sc Database, information about artists, track names, track lengths and music genre can be found on the "Gracenote" database and displayed on the COMAND units. With all versions of the audio units, an AUX IN jack is installed in the glove box as standard. This can be used to connect external devices (e.g. MP3 pl ayers) to the audio unit of the vehicle. The AUX IN jack is omitted on vehicles with the media interface special equipment option.

P82.86-8181-00

COMAND APS with 6-disk DVD changer (ECE version)


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Audio and communication Sirius satellite radio (for Canada) General

Input

The Satellite Digital Audio Radio (SDAR) allows reception of radio stations from the provider "Sirius Satellite Radio".

The SDAR antenna receives all three channels of the provider (Sat 1, Sat 2 and several terrestrial transmitters). The multifunction antenna routes the signals over a coaxial cable on to the SDAR control unit.

To achieve reception diversity, the Sirius satellite radio signal is transmitted in triplicate (by two satellites and several terrestrial transmitters).

Function The SDAR control unit allows the radio programs to be received. The Satellite Digital Audio Radio (SDAR) system is controlled via the Audio 20. The information and displays required to operate the system are displayed on the Audio 20.

Processing The SDAR control unit receives and decodes the signals.

Output The SDAR control unit then transmits the decoded digital radio signals to the Audio 20 via Media Oriented System Transport (MOST). The audio signals are output at the speakers. If a Sound system is installed, the audio signals are output at the speakers via the amplifier for the Sound system.

A2 A2/18 A2/65 H4 / 1 H4 / 2 H4 / 3 H4 / 4 H4/27 H4 /29 H4/33 H4/34 H4/54 H4/57 N40/3 N87 / 5

Radio Antenna amplifier Right antenna amplifier module Left door speaker group Right door speaker group Left rear door speaker Right rear door speaker Center cockpit speaker (centerfill) Subwoofer Left A-pillar tweeter Right A-pillar tweeter Left rear surround speaker Right rear surround speaker Amplifier for sound system SDAR control unit

MOST

Media Oriented System Transport

P82.86-8297-00

Block diagram of MOST ring, SDAR with sound system

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Audio and communication Digital Audio Broadcasting radio operation (for GB) General Digital Audio Broadcasting (DAB) is a digital transmission standard optimized for the mobile reception of radio programs. Several programs are bundled into "ensembles" on a particular frequency and transmitted together. One ensemble consists of up to twelve radio programs. Each ensemble is broadcast in a particular frequency range like a conventional FM radio station either nationally, regionally or locally. Listeners can thus also obtain tips about events happening in the region or listen to regional news etc.

The DAB functions are controlled via the respective audio unit.

Input The Digital Audio Broadcasting control unit receives DAB L-band signals from the DAB L-band antenna via a coaxial line and band III signals from the left antenna amplifier module via a coaxial line.

Processing The Digital Audio Broadcasting control unit converts the DAB L-band signals and band III signals into pulse code modulation (PCM) signals.

Function

Output

The Digital Audio Broadcasting control unit allows the reception of ensembles in DAB format on the following audio units:

The DAB status and the channel lists are transferred to the respective audio unit via Media Oriented System Transport (MOST). The audio signals are then transferred to the speakers. If a Sound system is installed, the audio signals are output at the speakers via the amplifier for the Sound system.

• Audio 20 with CD changer, code (510) • Audio 50 APS, code (511) or (525) • Comand APS, code (512) or (527)

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A2 /18 A2 /56 A2 /65 H4 / 1 H4 / 2 H4 / 3 H4 / 4 H4/27 H4 /29 H4/33 H4/34 H4/54 H4/57 N40/3 N87/3

Antenna amplifier Radio and navigation unit Right antenna amplifier module Left door speaker group Right door speaker group Left rear door speaker Right rear door speaker Center cockpit speaker (centerfill) Subwoofer Left A-pillar tweeter Right A-pillar tweeter Left rear surround speaker Right rear surround speaker Amplifier for sound system Digital Audio Broadcasting control unit

MOST

Media Oriented System Transport

P82.60-6387-00

Block diagram of MOST ring, DAB with Audio 50 APS and sound system


99

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Audio and communication Media interface General

Function

A universal device connection point known as "media interface" is available as special equipment for the NTG 2.5 audio units. This allows external audio devices to be connected to the vehicle via an adapter cable and then controlled using the on-board audio unit. The adapter cable is connected to the media interface control unit via the media interface electrical connector in the glove compartment. The media interface control unit is a subscriber to the MOST ring and is located under the glove compartment.

If an external audio device is connected to the adapter cable, the media interface control unit detects it via the connector in the glove compartment. Via MOST, the media interface control unit then indicates to the radio that a device has been connected. The media interface control unit then switches the audio application that is currently active over to the media interface. At the same time, the audio signals and data from the connected external audio device are transferred to the on-board audio unit via the following path:

The following device types can be connected via the adapter cables available as Mercedes-Benz accessories:

• • • •

• AUX devices with standard jack • iPod or serial USB devices (Media Transfer Protocol (MTP)) • Special USB devices (mass storage devices) The AUX IN jack installed in the glove compartment as standard is omitted on vehicles with the media interface special equipment option.

Adapter cable Media interface connector Media interface control unit MOST

The name of the artist and of the music track is displayed on the display of the radio and on the instrument cluster. On vehicles with COMAND but without a TV tuner, video signals and data are transferred via the appropriate adapter cable to the media interface connector, on to the COMAND controller unit via a direct line and then to the display.

P82.60-6268-00

Adapter cable and connection options 1 AUX IN jack 2 iPod connector 3 USB connector 4 Example of iPod device

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Operation The control signals for the externally connected audio device are activated via the buttons of the on-board audio unit or via the button groups of the multifunction steering wheel. The control signals from the buttons of the on-board audio unit are processed internally. The control signals from the button groups of the multifunction steering wheel are transferred to the steering column tube module via a direct line and sent from there to the on-board audio unit via interior CAN.

After evaluation of the control signals in the on-board audio unit, they are then sent to the external audio device via the following path: • • • •

MOST Media interface control unit Media interface connector Adapter cable

The connected external audio device evaluates the control signals and transmits the corresponding audio signals and data back to the on-board audio unit.

P82.60-6388-00

Block diagram of media interface, shown on Audio 50 APS A1 A2 /56 N80 N125/1 S110 S111

Instrument cluster Radio and navigation unit Steering column module Media interface control unit Left multifunction steering wheel button group Right multifunction steering wheel button group

X18/67

Media interface connector 1

AKMI

Media interface adapter cable (accessories)

CAN B LIN E1 MOST

Interior CAN Steering LIN Media Oriented System Transport


101

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Audio and communication Sound system With the New Telematics Generation 2.5, the new Harman/Kardon sound system is also installed in the vehicle as special equipment. In combination with the DVD/audio drive of the NTG 2.5 audio units, this supports discrete multichannel functionality as in model 204, 216 and 221.

One of the most striking characteristics of the new sound system is the increase in output from 320 watts previously to 450 watts (model 169.0 and 245) or from 320 watts to 350 watts (model 169.3), combined with the more intensive audio experience provided by Dolby Digital 5.1 surround sound.

P82.62-3332-00

Harman/ Kardon sound system, shown on B-Class A2 A2 /56 A40 /3 H4 / 1 H4 / 2 H4 / 3 H4 / 4

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Radio Radio and navigation unit COMAND operating, display and control ler unit Left door speaker group Right door speaker group Left rear door speaker Right rear door speaker

H4/27 H4 /29 H4/33 H4/34 H4/54 H4/57 N40/3

Center cockpit speaker (centerfill) Subwoofer Left A-pillar tweeter Right A-pillar tweeter Left rear surround speaker Right rear surround speaker Amplifier for sound system


Audio and communication LINGUATRONIC voice control system (VCS) The individual functions of the driver information system are called up and operated via the LINGUATRONIC voice control system (VCS). The VCS is integrated in the Audio 50 APS with DVD changer and COMAND APS. The new LINGUATRONIC generation features new functions and improved operating convenience. The system includes the following modifications: • Full-word input of town/ city and road names during navigation in the national language the head unit is adjusted to • Selection of telephone book entries without performing voice training on the system • Selection of radio stations without performing voice training on the system • Radio can be controlled by voice at any time, if activated • Language change via user selection • Use of synonyms • Integrated noise filter

TELE AID emergency call system (only Canada)

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Depending on their priority, the following functions can be performed via the emergency call function: 1 2 3 4 5 6 7

Automatic emergency call Manual emergency call Vehicle tracking Breakdown assistance MB Info call Authorization Vehicle remote unlocking


103

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Audio and communication Audio 5 radio system

P82.60-6372-00

Location of Audio 5 components, shown on B-Class A1 A2 A2 /18 A34/4 H4/1 H4/2

Instrument cluster Radio Antenna amplifier Telephone interface Left front door speaker group Right front door speaker group

H4 / 3 H4 / 4 H4/27 H4/29

Left rear door speaker Right rear door speaker Center cockpit speaker (centerfill) (with code (810) Sound system) Subwoofer speaker (with code (810) Sound system)


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P82.60-6371-00

Block diagram of Audio 5 H4/33 H4/34 N73 N80 S110 S111

Left A-pillar tweeter Right A-pillar tweeter EZS control unit Steering column module Left multifunction steering wheel button group Right multifunction steering wheel button group

AUX CDC

AUX IN jack CD changer

CAN B LIN E1

Interior CAN Steering LIN (with code (428) Steering wheel shift buttons)


105

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Audio and communication Audio 20 radio system

P82.60-6369-00

Location of Audio 20 components, shown on B-Class A1 A2 A2 /18 A2 /64 A2 /65

A2 /91 A34/7 A34 /15 H4/1

Instrument cluster Radio Antenna amplifier Left antenna amplifier module (only Canada version) Right antenna amplifier module (with code (537) Digital radio and code (833) Great Britain version) Bluetooth antenna Bluetooth module (with code (386) Mobile phone) (except Japan version) Universal Portable Cell Phone Interface (accessories, except Japan version) Left front door speaker group

H4/2 H4 / 3 H4 / 4 H4/27 H4/29 H4/33 H4/34 H4/54 H4/57

Right front door speaker group Left rear door speaker Right rear door speaker Center cockpit speaker (centerfill) (with code (810) Sound system) Subwoofer speaker (with code (810) Sound system) Left A-pillar tweeter Right A-pillar tweeter Left rear surround speaker (with code (810) Sound system) Right rear surround speaker (with code (810) Sound system)


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P82.60-6370-00

Block diagram of Audio 20 N40/3 N73 N80 N87/3

N87/5 N125/ 1 S110 S111

Amplifier for sound system (with code (810) Sound system) EZS control unit Steering column module Digital Audio Broadcasting control unit (with code (537) Digital radio and code (833) Great Britain version) SDAR control unit (only Canada version) Media interface control unit (with code (518) Media interface) Left multifunction steering wheel button group Right multifunction steering wheel button group

X18/67

Media interface connector 1 (with code (518) Media interface)

AKMI

Media interface adapter cable (with code (518) Media interface) (accessories)

A

Components on Canada version

CAN B LIN E1

Interior CAN Steering LIN (with code (428) Steering wheel shift buttons) Media Oriented System Transport

MOST


107

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Audio and communication Audio 50 APS radio and communications system

P82.61-3984-00

Location of Audio 50 APS components, shown on B-Class A1 A2 /18 A2 /56 A2 /64 A2 /65

A2 /91 A34/7 A34 /15 B25 H4/1

Instrument cluster Antenna amplifier Radio and navigation unit Left antenna amplifier module Right antenna amplifier module (with code (537) Digital radio and code (833) Great Britain version) Bluetooth antenna Bluetooth module (with code (386) Mobile phone) (except Japan version) Universal Portable Cell Phone Interface (accessories, except Japan version) Hands-free system microphone Left front door speaker group

H4/2 H4 / 3 H4 / 4 H4/27 H4/29 H4/33 H4/34 H4/54 H4/57

Right front door speaker group Left rear door speaker Right rear door speaker Center cockpit speaker (centerfill) (with code (810) Sound system) Subwoofer speaker (with code (810) Sound system) Left A-pillar tweeter Right A-pillar tweeter Left rear surround speaker (with code (810) Sound system) Right rear surround speaker (with code (810) Sound system)


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P82.61-3983-00

Block diagram of Audio 50 APS L6 / 1 L6 / 2 L6 / 3 L6 / 4 N40/3 N47-5 N49 N73 N80 N87/3

N125/ 1

Left front rpm sensor Right front rpm sensor Left rear rpm sensor Right rear rpm sensor Amplifier for sound system (with code (810) Sound system) ESP and BAS control unit Steering angle sensor EZS control unit Steering column module Digital Audio Broadcasting control unit (with code (537) Digital radio and code (833) Great Britain version) Media interface control unit (with code (518) Media interface)

S93 /2 S110 S111 X18/67

VCS switch Left multifunction steering wheel button group Right multifunction steering wheel button group Media interface connector 1 (with code (518) Media interface)

AKMI


CAN B CAN C LIN E1

Interior CAN Engine compartment CAN Steering LIN (with code (428) Steering wheel shift buttons) Media Oriented System Transport

MOST


109

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Audio and communication COMAND and COMAND APS radio and communications system

P82.86-8182-00

Location of COMAND audio components, shown on B-Class A1 A2 /18 A2 /34 A2 /64 A2 /65

A2 /91 A2 /94 A2 /95 A34/7 A34 /15 A40 / 3 A50 /3 A90 /3

Instrument cluster Antenna amplifier Central locking antenna (only Japan version) Left antenna amplifier module Right antenna amplifier module (with code (537) Digital radio and code (833) Great Britain version) Bluetooth antenna Electronic Toll Collection (ETC) antenna (only Japan version) VICS antenna (only Japan version) Bluetooth module (with code (386) Mobile phone) (except Japan version) Universal Portable Cell Phone Interface (accessories, except Japan version) COMAND operating, display and contr oller unit Electronic Toll Collection (ETC) co ntrol unit (only Japan version) Digital TV tuner (only Japan version)

A94 /1 A94 /2 B25 H4/1 H4/2 H4 / 3 H4 / 4 H4/27 H4/29 H4/33 H4/34 H4/54 H4/57

TV antenna amplifier 1 (only Japan version) TV antenna amplifier 2 (only Japan version) Hands-free system microphone Left front door speaker group Right front door speaker group Left rear door speaker Right rear door speaker Center cockpit speaker (centerfill) (with code (810) Sound system) Subwoofer speaker (with code (810) Sound system) Left A-pillar tweeter Right A-pillar tweeter Left rear surround speaker (with code (810) Sound system) Right rear surround speaker (with code (810) Sound system)


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P82.86-8183-00

Block diagram of COMAND audio L6 / 1 L6 / 2 L6 / 3 L6 / 4 N40/3 N47-5 N49 N73 N80 N87/3

N123/ 3 N125/ 1 S93 /2

Left front rpm sensor Right front rpm sensor Left rear rpm sensor Right rear rpm sensor Amplifier for sound system (with code (810) Sound system) ESP and BAS control unit Steering angle sensor EZS control unit Steering column module Digital Audio Broadcasting control unit (with code (537) Digital radio and code (833) Great Britain version) Telephone control unit, Japan (only Japan version) Media interface control unit (with code (518) Media interface) VCS switch

S110 S111 X18/67 X39/37

Left multifunction steering wheel button group Right multifunction steering wheel button group Media interface connector 1 (with code (518) Media interface) Cell phone separation point (only Japan version)

AKMI


A B C

Components on ECE version Components on Japan version Components with mobile phone, ECE version

CAN B CAN C LIN E1

Interior CAN Engine compartment CAN Steering LIN (with code (428) Steering wheel shift buttons) Media Oriented System Transport

MOST


111

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Climate control AC operating units In order to standardize and simplify the operation of the AAC [KLA] control and operating unit and comfort AAC [KLA] control and operating unit, the button assignments have been revised and defined more precisely.

The air conditioning system, code (580), and the comfort air conditioning system, code (581), influence the engine stop function on vehicles with ECO start/stop function, code (B01).

P83.30-4618-00

AAC [KLA] control and operating unit (N22) 1 2 3 4

112

Temperature control Air flow adjustment wheel Cooling with air dehumidification on/off Adjust air distribution

o

N22b1 N22s1 N22s2

In-car temperature sensor Rear window heater switch Air recirculation switch


Climate control

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In particular, the AAC [KLA] control and operating unit or comfort AAC [KLA] control and operating unit prevents the engine from being switched off via the ECO start/ stop function until the interior temperature approaches the set specified value.

P83.40-4086-00

Comfort AAC [KLA] control and operating unit (N22/ 7) 1 2 3 4 5 6 7 8

Air flow adjustment wheel Automatic climate control Defrost windshield on/off Increase left temperature Automatic air conditioning on/ off Increase right temperature Adjust air distribution Residual heat/ stationary ventilation on/ off

9 10 11 12

Display Cooling with air dehumidification on / off Lower right temperature Lower left temperature

N22/7b1 In-car temperature sensor N22/7s1 Rear window heater switch N22/7s2 Air recirculation switch


113

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Bodywork New exterior colors As part of the model refinement, the A-Class and B-Class are available in three new exterior colors. At the same time, three other exterior colors are no longer available with the model refinement. The following changes to the exterior colors on offer have been made: • The new steppe brown metallic special color replaces the sand dune beige special color. • The new lotus blue metallic special color replaces the atoll blue metallic special color. • The mountain grey metallic color, which was previously only available for one special model, now replaces the previous comet grey metallic special color across the board.

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Color designation

Color no. Mercedes-Benz

Steppe brown metallic

8490

New

Sand dune beige

1791

Omitted

Lotus blue metallic

5240

New

Atoll blue metallic

5375

Omitted

Mountain gray metallic

7787

New

Comet gray metallic

7748

Omitted


Bodywork Model plate and vehicle identification number (VIN)

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The model plate is mounted towards the bottom of the right-hand B-pillar.

P00.01-3573-00

Location of model plate, shown on model 245

1 2 3 4 5 6 7 8 9 10

Model plate Vehicle manufacturer EC operating permit number Vehicle identification number (VIN) Permissible gross vehicle weight Permissible traction weight Permissible front axle load Permissible rear axle load Paint code number Stamped vehicle identification number

P00.01-3572-00

Model plate, shown on model 245

Vehicle identification number (VIN) In addition to the model plate, the vehicle identification number (VIN) is also stamped into the bodywork. It is located at the rear of the engine compartment. The engine hood must be opened to check the VIN. The vehicle identification number is then visibl e on the bulkhead.

P00.01-3574-00

Location of stamped VIN, shown on model 245


115

s l o o t l a i c e p S

Drivetrain Clamping mechanism

Use Clamping mechanism for fixing in place/slackening belt tensioner on vehicles with starter generator.

DC number W266 589 00 31 00 P58.20-2234-00

FG 05 Set B

Alignment tool

Use For locking Lanchester balance shafts in the basic position and adjusting circumferential gear backlash of Lanchester balancer.

DC number W640 589 00 21 00 P58.20-2235-00

FG 03 Set C Note Replacement for 646 589 00 21 00 Adjustment tool

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Abbreviations ABS Antilock Brake System

ECO Economy

AHV Trailer hitch

EDW Anti-theft alarm system (ATA)

APS Auto Pilot System

EG European Community (EC)

AS Tow-away protection

ES Electric power steering

AUX Auxiliary

ESP Electronic Stability Program

BAS Brake Assist

ETC Electronic Toll Collection

CAN Controller Area Network CD Compact Disc

EZS Electronic ignition switch (EIS) FM Frequency Modulation

CDDB Compact Disc Database

GAP Gas system test

CDI Common rail Diesel Injection CO2 Carbon dioxide

H-GAS High-Gas HAU Automatic heater (HEAT)

COMAND Cockpit Management and Data System CNG Compressed Natural Gas CVT Continuously Variable Transmission DAB Digital Audio Broadcasting DAS Diagnosis Assistance System

HU Main inspection IRS Interior protection KLA Automatic air conditioning L-GAS Low-Gas LED Light emitting diode

DVD Digital Versatile Disc


117

Abbreviations LIM Variable speed limiter

ROZ Research Octane Number (RON)

LIN Local Interconnect Network

SA Special equipment

LPG Liquefied Petroleum Gas

SAM Signal acquisition and actuation module

ME Motor Electronics

SAT Satellite

MOPF Model refinement

SBS Voice control system (VCS)

MOST Media Oriented System Transport

SD Secure Digital

MP3 MPEG-1 audio layer 3

SDAR Satellite Digital Audio Radio (satellite radio)

MPEG Moving Picture Experts Group

SIM Subscriber Identity Module

MTP Media Transfer Protocol

TELE AID Telematic Alarm Identification on Demand (emergency call system)

NEFZ New European Driving Cycle (NEDC) NGT Natural Gas Technology NTC Negative Temperature Coefficient NTG 2.5 New Telematics Generation Version 2.5

USB Universal Serial Bus VIN Vehicle Identification Number WIS Workshop Information System ZV Central locking (CL)

PCM Pulse Code Modulation PTC Positive Temperature Coefficient PTS PARKTRONIC system

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Index A

F

AC operating units

. . . . . . . . . . . . . . . . . 112

Front view A-Class . . . . . . . . . . . . . . . . . . . . . . . 18 B-Class . . . . . . . . . . . . . . . . . . . . . . . 21

Active Park Assist incl. PARKTRONIC . . . . . . . . 88 Adaptive brake lights . . . . . . . . . . . . . . . . . 83 Audio and communication operating units Audio 20 . . . . . . . . . Audio 5 . . . . . . . . . Audio 50 APS . . . . . . COMAND /COMAND APS

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. 92 . 92 . 93 . 93

H HILL START ASSIST . . . . . . . . . . . . . . . . . . 70

I Innovations . . . . . . . . . . . . . . . . . . . . . . . 8

D

Instrument cluster

Digital Audio Broadcasting radio operation . . . . . 99 . . . . . . . . . . . . 34

A 200 CDI . . . . . . . . . . . . . . . . . . . . . . 78 B 170 NGT BlueEFFICIENCY . . . . . . . . . . . . 79

Dimensional concept . . . . . . . . . . . . . . . . . 9

Interior design . . . . . . . . . . . . . . . . . . . . . 32

E

L

ECO start/ stop function

Lanchester balancer . . . . . . . . . . . . . . . . . 44

Digital Service Booklet (DSB)

Component descriptions . Functional principle . . . . General . . . . . . . . . . Instrument cluster displays Main functions . . . . . . . New/ modified components

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. . . . . .

. 64 . 60 . 59 . 69 . 60 . 61

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. . . .

. 40 . 42 . 36 . 38

Engine M266 . . . . . . . . . . OM640 . . . . . . . . . Technical data of A-Class Technical data of B-Class

. . . .

Entertainment . . . . . . . . . . . . . . . . . . . . . 97 Equipment exceptions B 170 NGT BlueEFFICIENCY (model 245) . . . . . . 17

Equipment lines/ variants AVANTGARDE line (model 169) . . . . . . . . . . . 13 ELEGANCE line (model 169) . . . . . . . . . . . . . 13 Sport package (model 169) . . . . . . . . . . . . . 13

Equipment packages Chrome package (model 245) . . . . . . . . . . . . 17 Sport package (model 245) . . . . . . . . . . . . . 17

Exterior colors . . . . . . . . . . . . . . . . . . . . 114 Exterior lights Front lights Rear lamps

. . . . . . . . . . . . . . . . . . . . . 80 . . . . . . . . . . . . . . . . . . . . . 82

LINGUATRONIC voice control system (VCS) . . . 103

M Maintenance . . . . . . . . . . . . . . . . . . . . . . 34 Mileage-based servicing . . . . . . . . . . . . . . 34 Time-based servicing . . . . . . . . . . . . . . . . 35

Media interface . . . . . . . . . . . . . . . . . . . 100 Model plate . . . . . . . . . . . . . . . . . . . . . 115

N Natural gas drive Bivalent drive system . . . . . . . . CNG displays on instrument cluster Components . . . . . . . . . . . . Function . . . . . . . . . . . . . . . Gas distribution rail . . . . . . . . . Gas injection valve . . . . . . . . . Gas system check (GAP) . . . . . . Natural gas . . . . . . . . . . . . . Natural gas cylinders . . . . . . . . Pressure regulator unit . . . . . . . Tank recess . . . . . . . . . . . . . Variable intake manifold . . . . . . Vehicle safety . . . . . . . . . . . .

. . . . . . . . . . . . .

. . . . . . . . . . . . .

. . . . . . . . . . . . .

. . . . . . . . . . . . .

. . . . . . . . . . . . .

. . . . . . . . . . . . .

. . . . . . . . . . . . .

. . . . . . . . . . . . .

45 57 47 48 55 55 47 47 50 56 52 54 53

Navigation . . . . . . . . . . . . . . . . . . . . . . . 95 New Telematics Generation (NTG) 2.5 . . . . . . . 94


119

Upustvo 169 245

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