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
      - Models of 2000 of release
         Distribution of power
         Grounding distributing
         System of a charge
         System of start
         Cooling system fan
         Tempostat
         Control system of the engine of 2.3 l
         Automatic conditioner of air
         On-board computer
         Diagnostic DLC socket
         ABS
         Sheena CAN
         Anticreeping system
         External lighting fixtures
         Xenon headlights
         Headlights with DRL
         Headlights (without xenon)
         Control panel
         Illumination of salon when opening doors
         Illumination of devices
         Parktronic (PTS) system
         Uniform lock
         Glass heater
         Backing fires
         Chains of automatic blackout of an internal rear-view mirror
         Electric drive of adjustment of external rear-view mirrors
         Electric drive of back head restraints
         Electric drive of folding top / cover of the top hatch
         Drive of an otpuskaniye of a latch of the lock of a cover of the luggage compartment
         Heating of seats
         Horn
         Electric drive of adjustment of a driver's seat
         Electric drive of adjustment of a passenger seat
         Electric drive of regulators of window regulators
         The radio receiver with the amplifier and the tire of data of D2B
         The radio receiver with the amplifier and without tire of data of D2B
         The radio receiver without amplifier and with the tire of data of D2B
         The radio receiver without amplifier and without tire of data of D2B
         Systems of additional safety of SRS
         Automatic transmission
         Blocking of switching of transmission
         Windshield cleaner/washer
         Cleaners/washers of lenses of block headlights
      + Models since 2001 of release







Schemes of electric equipment

Models of 2000 of release

Codes of designation of color of isolation of an electrical wiring

Code Color
BLK Black.
BLU Blue.
BRN Brown.
GRN Green.
GRY Gray.
NCA  Any.
OR Or (GRN OR VIO = Green or violet).
ORG Orange.
PNK Pink.
PPL Purple.
RED Red.
TAN Golden.
VIO Violet.
WHT White.
YEL Yellow.

Provisions of the switch of a tempostat

MEMORY RECALL Call of data from memory.
DECEL/SET Деселерация / Installation.
ACCEL/SET Acceleration/installation.
OFF Off.

Abbreviations of signals/designation of plugs and contours

- Minus.
+ Plus.
12VCD Tension of the battery or regulator of tension at the working engine.
15 The switched power supply from the battery (moves in provisions 2 and 3).
15g The switched power supply from the battery (it is protected by a safety lock).
15R The switched power supply from the battery (moves in provisions 1, 2 and 3).
15u The switched power supply from the battery (it is not protected by a safety lock).
15X The switched power supply from the battery (moves in situation 2).
15Z The switched power supply from the battery (moves in provisions 2 and 3).
15C The switched power supply from the battery (moves before extraction of a key).
15X The switched power supply from the battery (moves in situation 2).
30 Not powered off the battery.
30z Plug 30, 1 entrance signal [Terminal 30, 1st input].
30Z The switched battery tension (moves in provisions 2 and 3).
30a Not disconnected battery tension.
30A Not disconnected battery tension (the party of "A").
30B Not disconnected battery tension (the party "In").
30E Not disconnected battery tension for electronics.
31 Grounding.
31b The switched connection to the case.
31e Grounding for electronics.
49 Entrance signal of indexes of turns.
49 Breaker signal.
49a Output signal of indexes of turns.
49L Left index of turns.
49R Right index of turns.
49a Signal of the pulse breaker.
50 Signal of the traction relay of a starter.
53 Entrance signal (+) screen wiper drive electric motor.
53 Low-speed mode of functioning of screen wipers.
53b The shunting screen wiper drive electric motor winding.
53b High-speed mode of functioning of screen wipers.
54 Chain of stoplights.
55 Fog lamps.
56 Headlights.
56a Chain of driving beam.
56b Chain of passing beam.
58 Chain of back marker/parking lights, illuminations of devices and registration plate.
58d Adjustable illumination of devices.
58k Illumination of devices (not processed).
58L Left parking сгонь
58R Right parking fire.
61 Control lamp of the generator.
61e Working signal of the generator.
81 Signal of the reverse gear.
81a Signal of the reverse gear (after switching of transmission).
85 Winding conclusion on (-) or the case.
85EDC Signal of management of the relay, electronic control of the diesel engine.
85F Management of the relay of a horn.
85LP Management of the relay of the air pump.
86 Conclusion of the beginning of a winding.
86KP Management of the relay of the fuel pump.
87 Entrance signal.
875A Power supply of the additional equipment.
87a First output signal (contact party of NC).
87ABS ABS food.
87b Second output signal.
87c Third output signal.
87EGAS Supply voltage of the electronic accelerator pedal (EA).
87GES Battery tension (it is protected by a safety lock).
87LP Supply voltage of the air pump.
87ME1 87 control units 1.
87ME2 87 control units 2.
87MOTR Supply voltage of the control unit of system of injection.
87UG Relay exit (it is not protected by a safety lock).
87Z Relay exit (it is protected by a safety lock).
AB Safety cushion.
AB F- Driver's safety cushion(s).
AB F+ Driver's safety cushion (+).
AB1, BF Safety cushion of 1 forward passenger.
AB1, FA Driver's safety cushion 1.
AB2, BF Safety cushion 2 forward passengers.
AB2, FA Driver's safety cushion.
ACSR Registrar of installation of a children's seat.
AL (-) Grounding of a lamp of illumination of an exit.
AL (+) Exit illumination lamp food.
AM Amplitude modulation (DV/SV/KV).
AM/FM Amplitude/frequency modulation (DV/SV/KV/VHF).
Ant. Antenna.
B Video signal, blue.
B + The output tension of the generator (it is activated at the started engine).
BBV Indicator of wear of brake shoes.
BFS Sensor switch of level of brake fluid.
BL (-) Stoplights (-).
BL (+) Stoplights (+).
BLS Normally opened contact of the sensor switch of stoplights.
BS Normally closed contact of the sensor switch of stoplights.
CL Uniform lock.
Crash Collision signal.
CTRL Management.
D + Working signal of the generator (as 61).
D2B IN Entrance signal of the tire D2.
D2B OUT Output signal of the tire D2.
Data - "Minus" consecutive interface.
Data + "Plus" consecutive interface.
DF HL Frequency of rotation of the left back wheel.
DF HL Sensor of the left back wheel of VSS.
DF HR Frequency вращинея right back wheel.
DF VL Frequency of rotation of the left forward wheel.
DF VR Frequency of rotation of the right forward wheel.
DF VR Sensor of the right back wheel of VSS.
DFA Output signal of speed.
DFA HL Exit of a signal of the left back wheel of VSS.

DG + 5V

+ 5B of pressure sensor.

DG Sig.

Pressure sensor signal.

DGM

Grounding of the sensor of pressure.

FH

Window regulator.

FH H

Signal "Up" window regulator.

FH HL

Window regulator of the left back door.

FH HR

Window regulator of the right back door.

FH T

Signal "Down" window regulator.

FH VL

Window regulator of the left forward door.

FH VR

Window regulator of the right forward door.

FM

Frequency modulation (VHF).

FSB

Parking brake.

G

Video signal, green.

GES

Signal of the sensor of the speed (VSS).

GND, GRND

Shielding, case (grounding).

GS

Emergency natyazhitel.

GS, BF

Natyazhitel of a seat belt of a front passenger seat.

GS, FA

Natyazhitel of a seat belt of a driver's seat.

GS, HL

Natyazhitel of a seat belt of the left back seat.

GS, HR

Natyazhitel of a seat belt of the right back seat.

H (-)

Grounding of the sensor of Hall.

H (+)

Power supply of the sensor of Hall.

H 1 Sig.

Signal of the 1st sensor of Hall.

H 2 Sig.

Signal of the 2nd sensor of Hall.

H Sig.1

Signal of 1 sensor of Hall.

H Sig.2

Signal 2 sensors of Hall.

HAR 1

Signal 1. Right back half shaft.

HAR 2

Signal 2. Right back half shaft.

HAR V

Supply voltage. Right back half shaft.

HH (-)

Grounding of the back sensor of Hall.

HH (+)

Supply voltage of the back sensor of Hall.

HHS

The warmed back glass.

HKL

The warming overlay of a seatback.

HKS

The warming overlay of a pillow of a seat.

HL

Antenna of the left back wheel.

HR

Antenna of the right back wheel.

HTR (-)

"Minus" probe heater.

HTR (+)

"Plus" probe heater.

HV (-)

Hall's sensor, grounding of adjustment of height.

HV (+)

Hall's sensor, supply voltage of adjustment of height.

IR (-)

"Minus" infrared receiver.

IR (+)

"Plus" receiver IK.

IR-Daten

Data of IK of the receiver.

K

Line K of diagnostics.

K (+)

Hall's sensor, supply voltage of adjustment of head restraints.

KI-SI

Additional lock of back window regulators.

LL L

The left lamp for reading.

LL R

The right lamp for reading.

LOC

"Plus" valve of management of level.

LOCK

Blocking.

Lsp. -

Grounding of a loudspeaker.

Lsp. +

Loudspeaker supply voltage.

MHH (-)

Grounding of an electric motor of lifting of a back seat.

MHH (+)

Supply voltage of an electric motor of lifting of a back seat.

MHV (-)

Grounding of an electric motor of adjustment of height.

MHV (+)

Supply voltage of an electric motor of adjustment of height.

Mikr. -

Grounding of the microphone.

Mikr. +

Microphone supply voltage.

MK (-)

Grounding of an electric motor of adjustment of height of head restraints.

MSKT (-)

Grounding of an electric motor of lowering of a pillow of a seat.

MSKT (+)

Supply voltage of an electric motor of lowering of a pillow of a seat.

Mute

Contour of shutdown of a sound.

MVZ (-)

Grounding of an electric motor of the drive of adjustment in the horizontal direction (back and forth).

MVZ (+)

Adjustment drive electric motor supply voltage in the horizontal direction (back and forth).

NF

Low Frequency (LF).

NF-L

Left LF loudspeaker.

NF-R

Right LF loudspeaker.

NHL

Left back valve of management of level.

NHRNSP

Right back valve of management of level.

NSL

Back foggy lamp.

NVL

Left forward valve of management of level.

NVR

Right forward valve of management of level.

O2S (-)

"Minus" lambda probe.

O2S (+)

Plus lambda probe.

P/N

Parking/neutral.

P-Sig.

Signal of position "P" of the lever of the selector.

PWR

Food.

R

Video signal, red.

R DOME

Back saloon lamp.

R/P-S (-)

"Plus" electromagnet of blocking of R/Ruble.

R/P-S (+)

"Minus" electromagnet of blocking of R/Ruble.

R50

Signal of the traction relay (after blocking of a starter).

RAS

Signal 2. Left back half shaft.

RAS 1

Signal 1. Left back half shaft.

RBCAN H

High-level communication signal of the tire of the CAN network controller.

RBCAN L

Low-level communication signal of the tire of the CAN network controller.

RF ERK

RFL

Backing fire.

RR

Antenna of a spare wheel.

RTR

Drive of a remote otpuskaniye of a latch of the lock of a trunk lid.

RV

The operating AT valve.

S10

Sensor 10, back.

S2

Sensor 1, forward.

S3

Sensor 2, forward.

S4

Sensor 4, forward.

S5

Sensor 5, forward.

S6

Sensor 6, forward.

S7

Sensor 7, back.

S8

Sensor 8, back.

S9

Sensor 9, back.

SA 1

Blackout of a mirror 1.

SA 2

Blackout of a mirror 2.

SB, HL

Left back side safety cushion.

SB, HR

Right back side safety cushion.

SB, VL

Left forward side safety cushion.

SB, VR

Right forward side safety cushion.

SBS

Sensor of side and window safety cushions.

SH (-)

"Minus" heating of mirrors.

SH (+)

"Plus" heating of mirrors.

Sig.

Signal.

SKT (-)

Hall's sensor, grounding of lowering of a pillow of a seat.

SKT (+)

Hall's sensor, supply voltage of lowering of a pillow of a seat.

SP1M

Grounding of a potentiometer of nominal rate 1.

SP1S

Toddler of a potentiometer of nominal rate 1.

SP2M

Grounding of a potentiometer of nominal rate 2.

SP2S

Toddler of a potentiometer of nominal rate 2.

SR

The shifted / folding top.

Start

Plug 50, otpuskaniye.

SV

Valve of switching of AT.

SV (-)

Grounding of forward sensors.

SV (+)

Supply voltage of forward sensors.

SYNC

Synchronization signal.

TNA

Output signal of turns of the electric motor/engine.

TV1

Video channel 1.

TV2

Video channel 2.

TV3

Video channel 3.

TV4

Video channel 4.

U

Supply voltage.

USP1

Supply voltage of a potentiometer of 1 nominal rate.

USP2

Potentiometer supply voltage 2 nominal rates.

V (-)

The valve (-).

VAL 1

Left forward half shaft 1.

VAL 2

Left forward half shaft 2.

VAL V

Supply voltage. Left forward half shaft.

VAR 1

Right forward half shaft 1.

VAR 2

Right forward half shaft 2.

VAR U

Supply voltage. Right forward half shaft.

VFE -

"Minus" power supply of the DTR sensor.

VFE +

"Plus" power supply of the DTR sensor.

VL

Antenna of the left forward wheel.

VR

Antenna of the right forward wheel.

VSS VL

Signal of speed of the left forward wheel.

VSS VR

Signal of speed of the right forward wheel.

VZ (-)

Grounding of the sensor of Hall.

VZ (+)

Supply voltage of the sensor of Hall.

W H (-)

Grounding of the forward alarm equipment.

W H (+)

Supply voltage of the forward alarm equipment.

W H (Data)

Signal of the forward alarm equipment.

W V (-)

Grounding of the back alarm equipment.

W V (+)

Supply voltage of the back alarm equipment.

W V (Data)

Signal of the back alarm equipment.

Wake up

Starting signal of the tire D2.

WB, L

Left window safety cushion.

WB, R

Right window safety cushion.

ZF

Average frequency.

ZF-Ant.

Antenna of average frequencies.

ZZH

Door closer.

ZZH-V

Valve of operational development of a door.

Designates number of the electrical wiring connected to the corresponding terminal block or the contact socket.

*

The asterisk designates the socket, not all wires of which are shown.