Mercedes C-Class

W203 since 2000 of release

Repair and operation of the car



Mercedes-Benz
+ Mercedes-Benz cars of class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ Cooling system and heating
+ Power supply system and release
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   Specifications
   Diagnostics of malfunctions of onboard electric equipment - the general information
   Check of the electric motor of a screen wiper
   Check of the warmed back glass
   Relay and safety locks
   Replacement of glow lamps of devices of external lighting
   Replacement of glow lamps of devices of internal lighting
   Removal and installation of the sensor of daylight
   Removal and installation of a headlight
   Removal and installation of a fog light
   Removal and installation of the lens of a fog light
   Removal and installation of a back lamp
   Replacement of the battery of a key of the ignition/remote control
   Removal and installation of the electric motor of screenwash
   Removal and installation of the electric motor of a cleaner of back glass
   Removal and installation of the tank of water and electric motor of the pump
   Removal and installation of the sensor of a rain
   Removal and installation of a sound signal
   Removal and installation of sensors of the parking
   Removal and installation of the sensor of temperature of external air
   Removal and installation of the control panel
   Removal and installation of the understeering switch
   Removal and installation of the switch of a forward plafond on a ceiling
   Removal and installation of group of switches to the left of the control panel
   Removal and installation of the switch of the central console
   Removal and installation of switches in the doorway
   Removal and installation of door switches of internal lighting
   Removal and installation of precautionary indexes of the assistant to the parking
   Removal and installation of the lighter
   Removal and installation of the radio receiver
   Removal and installation of a loudspeaker
   Digital tire of data of CAN
   The uniform lock - general information
   Installation of additional electric and electronic devices
   Appointment and arrangement of electric sockets
   + Schemes of electric equipment







Specifications

 Separate characteristics are provided also in the text of the Head and in case of obligation of their performance are highlighted in bold type.


General parameters

Glow lamps

12 V

Appointment

Socle, Type Power, W

Driving beam

H7/D2R 55/35

Passing beam

H7/D2R 55/35

Fog lights

HB4 55

Forward indexes of turns

PY 21

Parking light

W 5

Side repeaters of indexes of turns

WY 5

Back indexes of turns

PY 21

Stoplights

Р 21

Foggy lamps

Р 21

Backing lamps

Р 21

Lamps of illumination of registration plate

With 5

Marker lights

Р 4

Plafonds of internal illumination / lighting of a luggage carrier

With 10

H7HB4

Halogen lamp (fastening by a clip)

D2R

Xenon lamp of high voltage

Р

Bayonetny socle

PY

Bayonetny socle, orange

W

Glass socle

WY

Glass socle, orange

With

Spotlights

R

Bayonetny socle

Box of safety locks in the luggage compartment of the car


Predokhr.

Plug

Socket

Color and section of a wire, mm2

Appointment

Current (And)

1

15R

Adjustment of the left seat:

30

1, conclusion 5

Black-yellow 2.5

Control unit of adjustment/memory of provision of a driver's seat (N32/1)

2

15R

Adjustment of the right seat:

30

1, conclusion 6

Black-pink 2.5

Control unit of adjustment/memory of provision of a front passenger seat (N32/2)

Semi-electronic adjustment of front seats:

1 conclusion 6

Black-yellow 2.5

Relay of adjustment of driver's (K5/1)/passenger (K5/2) of a seat

3

30

Management of pressure of a rating of tires (TRS):

07.may

7, conclusion 1

Red-yellow 0.5

TPC (N88) control unit

TV ECE and USA:

9, conclusion 1

Red-yellow 0.75

TV tuner (Europe, USA, Japan) (A2/42)

TV Japan:

9, conclusion 1

Red-yellow 0.75

TV tuner (A2/10)

Model 203.7:

16, conclusion 1

Red-green 0.5

Receiver of radio-remote control (A6/1) of a stationary heater (STH)

17, conclusion 1

Red-green 0.75

Back saloon lamp (E15/3)

Models 203.0 and 203.2 with the Parktronic system and the back saloon lamp:

17, conclusion 1

Red-green 0.75

Alarm PTS display (back saloon lamp) (A44/3)

4

15R

1, conclusion 3

Black-green 2.5

Fuel pump (M3)

15

5

15R

-

-

Reserve relay 2 (N10/2ks)

20

6

30

28, conclusion 1

-

-

25

7

15R

-

-

Reserve relay 1 (N10/2kD)

20

8

30

23, conclusion 4

Red-yellow 0.75

Module of 1 amplifier of the antenna of back glass (A2/71)

07-5

ATA with TS and IMS:

4, conclusion 4

Red-blue 0.5

Siren of the alarm system (H3)

4, conclusion 5

Red-white 0.5

Sensor of an inclination of ATA (B33)

9

30

22, conclusion 4

Red-blue 2.5

Control unit of the ceiling control panel (N70)

25

10

15R

20, conclusion 5

Black 2.5

Heater of back glass (R1)

40

11

15R

20, conclusion 3

-

-

20

12

15R

Model 203.2:

20, conclusion 2

Black-green 1.5

Internal nest (X58/1)

15

13

15R

19, conclusion 1

Black-yellow 0.75

Pneumopump of an orthopedic seat (M40)

5

System of voice-activated control (VCS):

5, conclusion 2

Black-yellow 0.5

Block of voice-activated control (A35/11)

Cell phone Motorola Star TAC, retrofit:

5, conclusion 2

Black-yellow 0.5

The D2B interface for the portable mobile phone (A59/1)

Models 203.0 and 203.2 with lamps for reading:

12, conclusion 5

Black-gray 0.5

The back lamp for reading (E15/3)

Models 203.0 and 203.2 with lamps for reading and the Parktronic system:

12, conclusion 5

Black-gray 0.5

Alarm PTS display (back saloon lamp) (A44/3)

12, conclusion 5

Black-gray 0.5

PTS (N62) control unit

14

15R

30, conclusion 1

Black-yellow 1.5

- Э / motor of a cleaner of back glass (M6/4)

15

15

-

-

-

- Relay of a jellied mouth, receiver of polarity of 1 (N10/2kG)

10

16

30

For VSC:

20

5 conclusion 1

Red-violet 0.5

Block of voice-activated control (A35/11)

For CTEL Motorola Star TAC, retrofit:

5 conclusion 1

Red-violet 0.75

- The D2B interface for the mobile phone (A59/1)

17

30

S17 (external safety lock)

Red-green 2.5

For a turnbuckle:

20

- Socket of a turnbuckle (N28/1)

18

30

S18 (external safety lock)

Red-yellow 2.5

For a turnbuckle:

20

- 13-contact socket of a turnbuckle (X58)

19

30

S19 (external safety lock)

Red-white 1.5

- Pneumopump of a multicircuit seat (M40)

20

20

30

S20 (external safety lock)

Red-blue 0.75

For blackout of back glass:

7.5

- blackout of back glass (K74)

Relay

Location

Designation

And

Relay of the fuel pump (N10/2kA)

In

Relay 2, plug 15R (N10/2kv)

With

Reserve relay 2 (N10/2ks)

D

Reserve relay 1 (N10/2kD)

Е

Relay of a heater of back glass (N10/2ke)

F

Relay 1, plug 15R (N10/2kF)

G

Relay of a jellied mouth, switch of polarity of 1 (N10/2kG)

N

Relay of a jellied mouth, switch of polarity of 2 (N10/2kn)

Box of safety locks in salon


Predokhr.

Plug

Socket

Color and section of a wire, mm2

Appointment

Current (And)

21

30

X35/1 (socket of the left forward door)

Red белый/2.5

Control unit of the left forward door (N69/1)

30

22

30

X35/2 (socket of the right forward door)

Red серый/2.5

Control unit of the right forward door (N69/2)

30

23

30

-

-

Lighter

15

24

30

-

-

Spare

-

25

30

5, conclusion 4

Red зеленый/2.5

Control unit of the top control panel (N72/1)

10

26

30

1, conclusion 26

Red фиолетовый/4.0

Sound amplifier (A72/13)

30

27

30

2, conclusion 1

Red жёлтый/2.5

The control unit of the electric drive of adjustment of a driver's seat (with memory) (N32/1)

30

28

30

-

-

Spare

-

29

30

X35/33 (frame floor/socket of emergency supply)

Red синий/2.5

For a taxi: Special module of management of refusals (SVMCM) (N26/9)

30

30

30

1, conclusion 3

Red зеленый/4.0

Block of air circulation of a heater (A32)

40

31

30

And, conclusion 9

Red фиолетовый/1.5

EIS (N73) control unit

20

32

30

X35/3 (socket of the left back door)

Red чёрный/2.5

Control unit of the left back door

30

33

30

X35/4 (socket of the right back door)

Red белый/2.5

Control unit of the right back door

30

34

30, 15

-

Red фиолетовый/1.5

Coupling of the socket of a klea 30 (Z4/3)

07.5

Z4/3 (coupling of the socket of a klea 30)

Red фиолетовый/1.0

For system of an emergency call (USA) and the additional cell phone:

Cell phone and TELE AID D2B transceiver (A35/17)

Red фиолетовый/1.5

For the built-in phone:

Cell phone and transceiver of D2B (A35/13)

Red фиолетовый/1.5

For system of giving of a distress signal of TELE AID:

Cell phone and TELE AID D2B transceiver (A35/17)

Red фиолетовый/0.75

For the additional cell phone:

Telephone interface (A34/4)

27 (coupling of the socket of a klea 30)

CTEL (A28/3) compensator

Red / 0.5

For the additional cell phone:

Telephone interface (A34/4)

X39/37 (Socket of portable phone)

Red фиолетовый/1.0

For the Japanese models, models 203.0 and systems of an emergency call:

Cell phone and TELE AID D2B transceiver (A35/17)

35

30

1, conclusion 1

Red чёрный/2.5

For a stationary heater (STH):

30

Block of a heater of STH (A6)

36

30

-

Red / 1.5

For government cars (STH):

30

37

30

2, conclusion 2

Red белый/2.5

Control unit of the vacuum pump of the brake amplifier (N65/3)

25

38

30

2, conclusion 1

Red зеленый/2.5

Control unit of the electric drive of the right front seat (N32/2)

30

39

30

-

-

Spare

-

40

30

X35/33 (frame floor/socket of emergency supply)

Red белый/2.5

For a taxi and government cars:

30

Special module of management of refusals (SVMCM) (N26/9)

41

30

1, conclusion 2

Red синий/0.5

Control unit of the top control panel (N72/1)

07.5

1, conclusion 14

Red синий/0.75 2

For an automatic heater:

Control unit of the press button of a heater (N18)

For automatic K/B (AAC):

Control unit of the AAC (N22) press button

For system AAS "comfort":

Control unit of the AAS "comfort" press button (N22/7)

42

30

1, conclusion 5

Red жёлтый/0.5

Control panel (A1)

07.5


Box of safety locks and the relay in a motive compartment


Relay

Location

Appointment

I

Relay of a fanfare horn (N10/1kl)

To

Relay of the plug 87, chassis (N10/1kk)

L

Relay of the high-speed modes (1 and 2) of screen wipers (N10/1kL)

M

Relay of the plug 15R (N10/1km)

N

The operating relay of the pump KSG (N10/1kN)

About

Relay of the pump of admixture of secondary air (N10/1ko)

Р

Relay of the plug 15 (N10/1kr)

Q

Relay of inclusion/switching off of screen wipers (N10/1kQ)

R

Plug 87 relay, engine (N10/1kR)

S

Relay of a starter (N10/1kS)

Predokhr.

Plug

Socket

Color and section of a wire, mm2

Appointment

Current (And)

43a

15R

-

-

Relay of a fanfare horn (N10/1kl)

15

43b

30

-

-

Relay of a fanfare horn (N10/1kl)

15

44

15R

23

Black жёлтый/0.5

For system of giving of a distress signal of TELE AID:

5

TELE AID control unit (A35/8)

For the built-in phone:

Interface of D2B (A59)

For the additional cell phone:

Telephone interface (A34/4)

For system of an emergency call (USA):

Coupling of the socket 15R (Z3/12)

For system of an emergency call (Japan):

TELE AID control unit (A35/8)

45

15R

12, conclusion 4

Pink чёрный/0.75

It is protected by a safety lock via the coupling of the socket of a side safety cushion (Z3/31):

07.5

SRS (N2/7) control unit

46

15

-

-

Relay of inclusion/switching off of screen wipers (N10/1kQ)

40

47

15R

Illumination (except illumination of deflectors):

15

19, conclusion 6

Black жёлтый/0.75

Illuminations of a ware box with the sensor switch (E13/2)

19, conclusion 6

Black жёлтый/1.0

Illumination of a forward ashtray / lighter

48

15

3, conclusion 1

Black зеленый/1.0

Control unit of the vacuum pump of the brake amplifier (N65/3)

15

For the engine 112:

17, conclusion 3

Black жёлтый/1.5

The coupling (Z3/29) 15 socket protected by a safety lock

49

15

12, conclusion 3

Black красный/0.5

SRS (N2/7) control unit

07.5

50

15

19, conclusion 4

Black зеленый/0.5

Module of the switch of lighting (S1)

5

14, conclusion 1

-

-

51

15

19, conclusion 8

Black коричневый/0.5

Control panel (A1)

07.5

2, conclusion 6

Black белый/0.75

AAS (automatic To/in) with the built-in electric motor of the additional fan (M4/7)

For AAS "comfort":

19, conclusion 8

Black коричневый/0.5

Via the socket of sensors of climate control (X85/9):

Sensor of refusals of AAC (B31/1)

Sensor of sunlight of AAS (4 pieces) (B32/2)

For all cars with xenon headlights:

24, conclusion 1

Black розовый/0.75

Left block headlight (E1)

Right block headlight (E2)

52

50

17, conclusion 1

Violet / 2.5

Starter (M1)

15+

53

87

13, conclusion 3

Violet-blue 0.5

The back SAM control unit with a box of the relay and safety locks (N10/2)

15

Engine 111:

2, conclusion 9

Red-blue 1.5

ECM (N3/10)

15

Engine 112:

2, conclusion 9

Red-blue 0.75

ECM (N3/10)

15

3, conclusion 8

Red-blue 0.75

Valve of a purge of an adsorber (Y58/1)

15

17, conclusion 2

Red-blue 1.5

Klea socket coupling 87m1e (Z7/35)

15

Engine 611:

2, conclusion 9

Red-blue 2.5

Control unit of system of contact ignition (CDI) (N3/9)

25

3, conclusion 8

Red-blue 2.5

Control unit CDI (N3/9)

25

54

87

Diesel engines:

2, conclusion 2

Black-red 2.5

Control unit CDI (N3/9)

07.5

17, conclusion 4

Black-red 1.0

Heater of the inlet pipeline (R8)

07.5

Petrol engines:

2, conclusion 2

Black-red 2.5

Klea socket coupling 87m1e (Z7/36)

15

17, conclusion 4 (only engines 112)

Red-green 1.0

(only engines 112)

Klea socket coupling 87m1e (Z7/36)

07.5

55

87

7, conclusion 5

Red-green 0.5

Sensor of turn of a steering wheel (N49)

07.5

DTR:

21, conclusion 1

Red-blue 0.75

DTR (N63/1) control unit

AT:

9, conclusion 1

Red-white 0.75

ETC (N15/3) control unit

9, conclusion 3

Red-blue 0.75

Electronic control unit of the lever of the selector (N15/5)

Automated by the check point (Sequentronic):

9, conclusion 1

Red-white 1.0

Sequentronic control unit (N15/6)

9, conclusion 3

Red-blue 0.75

Sensor switch of provision of transmission (S16/10)

56

87

7, conclusion 3

Red-blue 0.75

ESP and BAS control unit (N47-5)

5

7, conclusion 4

Red-yellow 0.5

Sensor switch of stoplights (S9/10)

57

30z

19, conclusion 1

Red-black 0.5

Sensor of turn of a steering wheel (N49)

5

19, conclusion 1

Red-blue 0.5

Control unit of electronic ignition / датчика-выключателя disconnections of a chain of a starter of stoplights (N73)

Engine 112:

2, conclusion 4

Red 0.75

ECM (N3/10)

58

30

Automated by the check point (Sequentronic):

9, conclusion 4

Black-blue 0.5

Sequentronic control unit (N15/6)

40

59

30

8, conclusion 2

Red 4.0

ESP and BAS control unit (N47-5)

50

60

30

8, conclusion 1

Red 2.5

ESP and BAS control unit (N47-5)

40

61

30

Automated by the check point (Sequentronic):

9, conclusion 6

Black-green 0.5

Sequentronic control unit (N15/6)

15

62

30

2, conclusion 11

Red-green 0.75

DLC (X11/4) socket

5

19, conclusion 2

Red-yellow 0.5

Module of switching of lamps (S1)

7, conclusion 7

Pink-green 0.5

Sensor switch of stoplights (S9/1)

63

30

19, conclusion 5

Red-green 0.5

Module of switching of lamps (S1)

5

64

30

Radio receiver:

11, conclusion 2

Red-blue 2.5

Radio (A2)

10

COMAND version:

11, conclusion 2

Red-blue 2.5

Display and control unit of functioning of COMAND (A40/3n1)

65

15

Admixture of air in an exhaust:

17, conclusion 5

Red-white 4.0

Electric air pump (M33)

40

Efforts of tightening of threaded connections, Nanometer

The moments of an inhaling of fixture are given also in the text of the Head and on some illyustratsiyakh*.

* The moments of an inhaling highlighted in the text in bold type are subject to exact observance; the efforts which are not highlighted in bold type are given only approximately.