Fuse box and relay diagram – Mercedes-Benz C-Class W202
Applies to new vehicles in the years: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000.

Main fuse box in engine compartment (up to 30/11/94)

NumberAmpere [A]Description
17.5Right low beam headlight
215Front cigarette lighter    with ashtray lighting
Glove compartment lamp with radio switch
(up to 09/93)
310Seat Belt Reminder Control Module (USA)Automatic heater button control moduleAutomatic climate control (AC) button control module.Air conditioning button control module (temperature).
415Emergency flasher with trailer Instrument panel Clock
Warning buzzer Taxi roof sign

5windsSeat belt control module and
vehicle speed warning radioAutomatic heater button control moduleAutomatic climate control (AC) button control module.Air conditioning button control module (tempmatic)Relay to limit the use of residual engine heatSound signals
67.5Direction indicators with trailer
77.5Left low beam headlamp
87.5Rear window defroster switch
97.5Cigarette lighter lightingLicense plate lightingInstrument panel, instrument lighting
10Reserve
117.5Auxiliary fan relay, 1st and 2nd stage (K9)Air conditioning (automatic) / air conditioning (tempmatic)
Automatic air conditioning (AC) button control moduleAir conditioning button control module (tempmatic)
1210Stop light switch:
Stop light Trailer stop light
Brake signal for ABS
Brake signal for ASR
Brake signal for ASD
Brake signal for cruise control
Cruise control moduleInstrument panel, bulb failure warning lightOutdoor Lamp Fault Monitoring Module
13thirtyAuxiliary fan relay, 1st and 2nd stage
14thirtyHeating system recirculation:
Fan motorFan regulator
15thirtyCombination switch:
headlight flasherHeadlight washer systemWindscreen
washer pumpWindscreen wiper
motorCombination
relay
16thirtyCombined relay: rear window defroster control
1740Air Injection Relay, 104 HFM-SFI Engine
187.5Via external light failure monitoring:
Left rear position light / tail light
Left front position light Left rear position light
Trailer rear light
197.5Right high beam headlight
2010Heated front seat control module (HS) with
radio remote control for rear window power sunshade switch
21windsAutomatic antenna
7.5Radio
2210Fog light right/left
2315Overvoltage protection relayLockout cut-off relay
Data link connector
Clutch pedal switch,
idle control Purge control valve
Preheat time limit relay
Engine speed mixture control module
Speed ​​control switch Camshaft
adjusterIntake manifold heater relayTank vent valveVariable Resonance Intake Manifold Diverter Valve
2410Headlight washer system
By monitoring external light failures:
right parking light, rear position light
Right front clearance light Right rear clearance lightTrailer rear light
257.5Left high beam headlightHigh beam warning light
267.5Telephone transmitter/receiver
Comfort relay Comfort control moduleSRS fault warning light
277.5Front left door entry/exit lightFront right door entry/exit
indicator Data link connector
287.5Rear fog light with trailer
2915Heated windshield washer nozzle left / right
Outside rearview mirror adjustment with heated mirrors:
Outside/inside mirror switch (S50)Mirror heatingReversing light switch, manual transmission
Ignition lock / reversing light switch, automatic transmission
3010Headlight washer system:Headlight washer relayLeft and right windshield wiper motor
31Reserve
327.5Test connector for Diagnostic Module II (US)
Diagnostic Module II (US)
3315Dome headlamp with switch-off delay and reading lamp,
rear ceiling lamp, boot
lamp, left and right sun visor with illuminated mirror in bathroom,
air conditioning, central locking
3410Exterior mirror with opening/
closing function Headrest release valve with switch-off delay
Daytime running light control module
357.5Pneumatic equipment, central locking
Front dome with switch-off delay and reading lamp
Immobilizer relay
ATA control module with/without infrared remote control
Trailer recognition control module

Main fuse box in engine compartment (1.12.94-31.5.97)

from 1.12.94 to 31.8.96

from 1.9.96 to 31.5.97

NumberAmpere [A]Description
17.5Direction indicatorsTrailer direction indicators
Taximeter, taxi (until 31.8.95)
2windsfrom 1.12.94 to 31.8.95: Acoustic signals
Horn
Automatic heater:
DHW recirculation pump
Automatic heater control module
Double valve
Automatic recirculation heater and waste heat utilization motor:
Automatic recirculation heater control unit
Extractor fan
Air control module for climate control buttons (tempmatic) Automatic climate control (AC) button control module.Daytime running light control moduleSeat Belt Reminder Control ModuleSeat Belt Control and Vehicle Speed ​​Warning Module
from 1.9.95 to 31.5.97: Acoustic signal
Climate control (Tempmatic):
Electric fan control module
Air recirculation valve
Climate control (Tempmatic) or Climate control (Automatic)
Electric fan control moduleDaytime running light control module
15from 1.9.95 to 31.5.97:
Automatic  heater beep :Recirculation valve
Automatic heater
Daytime running light control module
310from 1.12.94 to 31.8.95:
Instrument panel External lamp Module fault Monitor  Stop lamp switch : Stop lamp

Trailer stop light Cruise
control brake signal
Brake signal for ABS
Brake signal for ASR
Brake signal for ASD
Cruise control / brake light module Switch with intermediate bridge
7.5from 1.9.95 to 31.8.96:Instrument cluster
External lamp failure monitoring module
Taximeter, taxi
15from 1.9.96 to 31.5.97:Instrument cluster
External light failure monitoring module
Stop light switch:Stop lights
Trailer stop lightsCentral stop light
High-mount chassis control module
Heated windshield washer
nozzle Taximeter
47.5Right low beam headlight
15ATA low beam projector
57.5Left low beam headlamp
67.5Right high beam headlight
77.5Left high beamHigh beam indicator
810Left fog lightRight fog light
940until 31.8.95:    Fan regulator, air conditioning (automatic) / air conditioning (tempmatic)
thirtyfrom 1.9.95 to 31.5.97:Fan regulator, air conditioning (automatic) / air conditioning (tempmatic)
1015Emergency warning light with trailer Instrument panel
A sign
on the roof of a taxi
1140Rear window defroster:Combined relay (turn signal/danger, heated rear window, windscreen wiper motor)
12windsuntil 31.8.95:
Automatic air heater with air recirculation and engine waste heat utilization system:
Hot water recirculation pump Switching valve
Fresh air/recirculation valve
Double valve Air conditioning button (temperature).Automatic climate control (AC) button control module
Seat belt reminder control module
Automatic heater with air recirculation and waste heat utilization system:Residual heat usage time relay
Cigarette lighter (customer option)
10from 1.9.95 to 31.5.97:
Acoustic warning lamp
Automatic heater with air recirculation and use of residual engine heat
Air conditioning (tempmatic)
Air conditioning (automatic)
Mini-bar (customer option)
Lighter (customer option)
15from 1.9.95 to 31.5.97 (Only when the cigarette lighter is reconnected to bar 30):
Acoustic warning lamp
Automatic heater with air recirculation and residual heat exploitation system
Air conditioning (tempmatic)
Air conditioning (automatic)
Mini-bar (customer option)
Cigarette lighter (customer option)
1340Combined relay:
Windscreen wiper motor (interval circuit)
Rear window defroster control (from 1.9.96 to 31.5.97) Rear window defroster (from 1.9.95
to 31.8.96):
Rear window defroster switchCombination switch:Headlight flasher Windshield wiper motor Windshield
washer pump
Windshield wiper motorWindshield wiper motor (interval circuit)
1415Front cigarette lighter  with ashtray lighting
Glove compartment lamp with switch Rear window defroster switch (from 1.12.94 to 31.8.95)Garage door opener (USA; 1.9.96 to 31.5.97)
Rear seat heater relay (customer option)
1515Right parking light Right rear position light Right front
clearance light Right rear
clearance light
Right trailer rear lightInstrument panel
Headlight washer system connected
License plate lightCigarette lighter lighting
167.5Left parking light
Left rear position light
Left front position light Left rear position light
Left trailer rear light
177.5Rear fog lights
Rear fog lights on a trailer
1840until 31.8.95:
Automatic heater:
Air flow switch, fan motor
Automatic air heater with air recirculation and waste heat utilization system Motor:
Air flow switch, fan motor
7.5from 1.12.94 to 31.8.95:
Climate control button control unit (tempmatic)Automatic climate control (AC) button control module
from 1.9.95 to 31.8.96:
Automatic heater:
Air flow selector, blower motor
Automatic heater with recirculated air and use of residual heat Motor:
Air flow selector, blower motor
Air conditioning (tempmatic):
Blower, auxiliary blower
Air conditioning (automatic):
Blower, auxiliary blower
from 1.9.96 to 31.5.97:
Automatic heater:A/C Fan Button Control Module (Tempmatic A/C)
Fan, Auxiliary FanFan, Auxiliary A/C button control module
(Auto A/C)
1915from 1.9.95 to 31.5.97:    junction box for cargo area, T models
207.5
Airbag failure indicator: SRS failure indicator
Emergency voltage divider control module with
airbag comfort relay
2115Heated Front Seat (HS) Control Module
Radio Transmitter/Receiver
2210Electric switch for rear window sunshade
2315Dome headlamp with switch-off delay and
ATA control module Reading lamp Infrared remote central locking control
module Dimmable interior mirror:
Dimmable electronic rearview mirror
ATA:
Immobilizer relay
Rear headrest release:
Headrest release valve with delayed deactivation socket
, towing hitch, 13 pin
2415Left/right exterior mirror adjustment: mirror heatingOutside mirror / inside mirror switch Reversing light switchLeft/right exterior rearview mirror adjustment with open/close function: mirror heatingOutside rearview mirror switch / inside outside rearview mirror switchExterior mirror with folding in/out function, mirror folding motors
Orthopedic backrest
25windsHeated front seat control module (HS).
2615Radiotelephone transmitter/receiver
2715Front dome with switch-off delay and reading light
Rear dome Trunk light
Infrared remote central locking control module
Pneumatic equipment, central locking
2840Via air injection relay: electric air pump
29thirtyAuxiliary fan ECEAuxiliary fan (USA, Japan)
3015from 1.12.94 to 31.8.95:
Overvoltage protection relayPre-ignition time limiter relayKick-down release relay
Ventilation control valve
Solenoid actuator, adjustable camshaft timing
Clutch pedal switch, idle control
Reservoir vent valveVariable resonance intake manifold valve
thirtyfrom 1.9.95 to 31.8.96:
Overvoltage protection relay Glow time limiter relay
Electromagnetic actuator, adjustable camshaft timing,
Ventilation control valveStop
light switch
: Stop light switchTrailer stop warning light
Brake signal for cruise control
BrakeBrake signal for ABS
Brake signal for ASR
Brake signal for ASD
Cruise control module
Tank vent valveVariable Resonance Intake Manifold Diverter Valve, 6 Cylinder
3110Heated left/right windshield washer nozzleWindshield wiper water heater starter lock switch
/reversing lamp switch
Automatic transmission auxiliary fan relay, 1st and 2nd stage (up to 31.8.95)
327.5Data link connector
Diesel shut-off valve (up to 31.8.95)
337.5Test connector for Diagnostic Module II (US)
Diagnostic Module II (US)

Main fuse box in engine compartment (as of 05/31/97)

NumberAmpere [A]Description
15Heated front seat control module (HS)
Front left seat belt comfort function coil (up to 31.5.98) Front right seat belt comfort coil (up to 31.5.98)
Seat adjustment relay (from 1.6.98 to 31.5.99)
Automatic Seat belts with locking function (from 1.6.
25Emergency Retractor Tensioner Control Module (ETR) with Airbag (AB)
Automatic Child Seat Recognition Sensor (ACSR)
Left Side Airbag SensorRight Side Airbag Sensor
315from 1.6.97 to 31.5.99:
CTEL radio transmitter receiver
for MB D-net telephone or D-net “Standard” telephone (until 31.05.98)
CTEL interface for D-net “Handy” telephone (up to 31.5.98)
Voice control system (from 1.6.98 to 31.5.99)
5from 1.6.99:
Cellular telephone / Handy (USA; from 1.6.99)
Fixed installation CTEL transmitter and receiver
Cellular telephone interface “Handy”
Voice control system (VCS)
45Instrument cluster: airbag indicator and warning light, supplemental restraint system (SRS)
515from 1.6.97 to 31.5.98: Rear sunblind switch
(center console) Navigation processor
Cargo compartment socket (202 T model)
windsfrom 1.6.98:Rear window sunshade switch  (center console) Center console:Outside rearview mirror switch (with open/close function)
67.5from 1.6.97 to 31.5.98:
Centre console: Exterior mirror switch (with opening/closing function)
From 1.6.98 to 31.5.99:
Automatic steering system (APS)
Navigation processor
CTEL transmitter and receiver with telephone on D-network, permanently installed
Cellular interface with “Handy” on D-network
Emergency call system, TELE AID
from 1.6.99:
Emergency call system
77.5Lower control panel:
Exterior mirror adjustment
Electric window, left/right Switch
illumination Reversing
recognition
Boot lid remote control
Automatic guidance system (APS) (up to 31.5.99)
CTEL transmitter and receiver with telephone on D network, fixed installation (from 1.6.98)
Mobile phone interface with “Handy” D network (from 1.6.98)
Emergency call system, TELE AID (from 1.6.98 to 31.5.99)
Navigation processor (from 1.6.98 to 31.5.99)
8thirtyDriver’s side front door control module:
rear light
Exterior mirror adjustment, defrosting
Electric window
Seat memory switch
Switch lighting
Central
locking Easy closing
925Ceiling control panel:
sliding /
folding roof Front / rear dome lamp
Rain sensor
Comfort closing Make-up mirror
Interior
rearview mirror dimmer
Interior RF receiver
Exterior rearview mirror dimmer
Switch lighting
Garage door opener (US)
1015CTEL radio transmitter receiver
for MB D-net telephone or D-net “Standard” telephone or CTEL interface for D-net “Handy” telephone (until 05/31/98)
11windsHeated front seat
1225Audio system: Left/right audio power amplifier
1315Headlight range adjustment control module (with xenon headlight)
Reversing light (for switch) (from 1.6.98)
145Parktronic System (PTS)
taximeter
1515from 1.6.97 to 31.5.99 (T models):
Rear windscreen wiper
from 1.6.99:
Stop light (NO contact): Stop lights
Drive
system control module 3rd stop light Trailer
stop lights
165from 1.6.97 to 31.5.99:
Steering angle sensor, for electronic stability program (ESP)
from 1.6.99:
Rear windscreen wiper (T model)
17thirtyDriver’s side rear door control module:
Comfort closing
Switch illumination
Central locking
Exit light
Exterior mirror adjustment, defrosting
Electric windshield
Seat memory switch
1825Flashing with trailerEmergency flasher with trailer (up to 31.5.98)
Auxiliary direction indicators (up to 31.5.98)
Continuous positive towing signal (up to 31.5.98)
1910InstrumentationExternal light failure monitoring module
Daytime running light control moduleStop light (normally open contacts; until 5/31/99):Stop lights
Driving system control moduleHigh mounted center brake lightTrailer Stop Lights
2015Automatic Heater (HEAT): Push-button heater control
module
In-car temperature sensor
Fresh/recirculated air flap switch valve Air
Conditioning (Tempmatic): Push-button air conditioning control module (Tempmatic A/C)Internal temperature sensor
Fresh/recirculated air damper diverter valveAir conditioning (automatic):Air conditioning control button (automatic climate control)
Emissions sensor (until 31.5.98)
2115
2210Combination switch:
windscreen wiper,
headlight flasher
, windscreen washer pumpIndicators, direction indicator, steering
2315Front cigarette lighter    (with ashtray illumination)
Glove compartment lamp Garage door opener (USA; until 05/31/98)
2415Parking light right
Rear light right Side marker lights
front and rear
right Trailer light rear right Instrument
cluster License plate lightingCigarette lighter lighting
Headlight washer system
257.5Left parking light
Left rear light Front and rear marker lights left
Trailer left rear light
267.5Rear fog lights
, trailer
2715Electronic Steering Lock:
Electric Steering Column Control Module (ESC)
Coil
2810from 1.6.97 to 31.5.99:Roof sign (taxi; until 31/05/98  )
Lighter  minibar
5from 1.6.99:Steering angle sensor, with electronic stability program (ESP)
29thirtyFan motor
from 1.9.96: Auxiliary fan (engines 111.943 / .973, 112, 604, 605 code 581a)
40from 1.9.96:    Electric suction fan (engine 111 cod. 581a)
3010InstrumentationAutomatic heater (HEAT):Push button heater control module
Two-valve coolant circulation pump Air conditioning (Tempmatic)
:Push-button climate control module (Tempmatic A/C) Two-valve
coolant circulation pump Climate control (automatic): Push-button climate control module (automatic climate control) Emissions sensor (up to 31.5.98)


317.5until 31.5.98:    Right dipped beam headlamp
15from 1.6.98:    right low beam
327.5until 31.5.98:    Left dipped beam headlamp
15from 1.6.98:    left low beam
337.5Right high beam headlight
347.5Left high beam headlightHigh beam indicator
3515Left and right fog lights
Turning off the headlights (USA)
36
3725from 1.6.98:    Heater amplifier
40from 1.6.99:    For ESP return pump (Bosch) (M112, M113)
38thirtyAuxiliary fan (engines 111, 112, 601, 604, 605 with automatic air conditioning)
40380W Electric Fan (111 Motor with Automatic Air Conditioning), M112 USA/Japan
60Electric suction with 550 W power for 112, 611 engines with automatic air conditioning
NumberAmpere [A]Description
39
4010Fanfare horns
4115Direction indicatorsHornWindshield wiperWindshield washer pumpRain sensorRear window defrosterEngine fanEngine waste heat exploitation system Headlight washer system
Emergency flashers
427.5Water heater for window cleaners
437.5Windshield washer pump
4440Windshield wiperRain sensor
4515Headlight washer system

Fuse box in the trunk (until 11/30/94)

NumberAmpere [A]Description
125Front left seat power switch: Headrest
Backrest Seat height
225Front right seat power switch:
Seat heightSeat forward/backward
325Front left seat power switch:
Seat heightSeat forward/backward
425Front Right Seat Power Switch: Headrest
Backrest Seat Height
525Audio system: Amplifier control module (left/right speakers)
67.5CD player with changer
7thirtyComfort control module:Electric windows, tilt and slide sunroof – Electric rear windows
8
97.5Comfort relayComfort control module: electric windows, tilt and slide sunroof
10thirtyComfort control module: power windows, tilt/slide sunroof – power windows front
117.5ATA Control ModuleTowing Sensor Control Module
12windsHeated front seat control module (HS).
13windsSliding and tilting roof
14
15
16
177.5Telephone transmitter/receiver
1825Socket, tow hook,
13 pin fuel pump relay
19

Fuse box in the trunk (   from    1.12.94)

NumberAmpere [A]Description
125until 31.5.97: Car radio:    Amplifier control module (left/right speakers)
from 1.6.97:    Fuel pump
27.5Injection system
thirtyfrom 1.6.97:
Pneumatic system equipment (PSE):
Central locking (pump)
Reflector, terminal 56b for anti-theft device (ATA)
3windsuntil 31.5.97:
ATA control moduleTowing sensor control moduleInfrared remote
control (from 1.12.94 to 31.8.96)
thirtyfrom 1.6.97:    Driver’s side front door control module
47.5from 1.12.94 to 31.8.96:    Automatic antenna for sedans
40from 1.6.97:
Pneumatic system equipment (PSE):
Rear window demisting
Central locking Anti-theft alarm (ATA)
57.5until 31.5.97:
Entry/exit light on the left front doorEntry/exit light on the left front door
thirtyfrom 1.6.97:    Driver’s side rear door control module
625until 31.5.97:    socket, towing hook, 13 poles
5from 1.6.97:
Rear ceiling light Boot
light Seat adjustment relay
Rear dome light (taxi)
7thirtyuntil 31.5.97:    Comfort control module:Electric windows, tilt and slide sunroof – Electric rear windows
5from 1.6.97:
For ATA:
ATA tilt sensor
Left IR transmitter and receiver (internal protection system)
Right IR transmitter and receiver (internal protection system)
Alarm siren with additional battery
8thirtyuntil 31.5.97:    Comfort control module:Electric windows, tilt and slide sunroof – Electric front windows
10from 1.6.98 to 31.5.99:
Emergency call system from 1.6.99:
Emergency call system (except USA) E-call
control module
E-call telephone
9windsuntil 31.5.97: tilting    and sliding roof
from 1.6.98:    Service vehicles
1025Front left seat power switch:
Rear seat height
Headrest up/down
Backrest
1125Front left seat ignition switch:
front/rear seat
Front seat height
1225Front right seat power switch:
front seat height/rear seat height
1325Front right seat power switch:
Rear seat height
Headrest up/down
Backrest
14Heated rear seat (from 1.12.94 to 31.5.97)
15Reserve
16Reserve
17Reserve

Relay box

NumberRelay
AO2S Heater Relay Module 2 (After TWC)
BASR charge pump relay module (up to 11/94)
AIR relay module
C.Auxiliary fan relay module (stage 1) (11 / 94-08 / 95)
Reserve (from 09.95)
C+DAuxiliary fan relay module (stage 1 [up to 11/94] and 2)
Auxiliary fan relay (stage 1) (up to 11/94)
Auxiliary fan relay (stage 2) (up to 11/94)
DAuxiliary fan relay module (stage 2) (11 / 94-08 / 95)
Reserve (from 09.95)
EHCS Relay Module
FHorn Relay Module
G.Separation relay module (terminal 56 / 56b, daytime running lights) (Canada)
HRelay for high pressure/return pump (from 06/94)
KCombined relay (turn signal/danger, heated rear window, windscreen wiper motor)
LOutdoor Lamp Fault Monitoring Module

Engine 111

NumberDescription
A1e26“ENGINE CHECK” MIL
K1 / 2Overvoltage protection relay module (9 pin)
K17AIR relay module
K27Fuel pump relay module
K35O2S Heater Relay Module 2 (After TWC)
N3 / 4Engine Control Module (HFM-SFI)
X11/4Data link connector (DTC reading)
Y3 / 3Top gear reverse valve delay

Motor

NumberDescription
N3 / 4HFM Motor Controller
K1 / 2Overvoltage protection relay
K27Fuel pump relay
Mercedes-Benz Classe C W202 (1993-2000) fuses and relays. Mercedes-Benz Classe C W202 (1993-2000) fuse diagram.