Mercedes-Benz C-Class (W203; 2000-2007) fuses and relays

Fuse box diagram (location and assignment of electrical fuses and relays) for Mercedes-Benz C-Class (W203; 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007).

Fuse box diagram: Mercedes-Benz C-Class
(W203; 2000-2007)

Instrument Panel Fuse Box

The fuse box is located on the edge of the instrument panel, on the driver’s side, under the coverThe location of the fuses in the passenger compartment: Mercedes-Benz C-Class (2000-2007)

Fuse box diagramInstrument panel fuse box diagram: Mercedes-Benz C-Class (2000-2007)

Assignment of the fuses in the Instrument Panel Fuse Box
Circuit protectedA
21Left front door control unit30
22Right front door control unit30
23Up to 30.11.04: Central gateway control unit15
24CD player with changer (in glove compartment)7.5
25Upper control panel control unit30
26Sound amplifier25
27Driver-side front seat adjustment control unit, with memory
Special vehicle multifunction control unit (SVMCU [MSS])
30
28Spare30
29Driver-side front seat adjustment control unit, with memory
Driver-side front seat adjustment control unit, with memory
Special vehicle multifunction control unit
30
30Heating systems recirculation unit40
31EIS [EZS] control unit
Electric steering lock control unit
20
32Left rear door control unit30
33Right rear door control unit 30
34Cell phone separation point
up to 31.5.01:
Telephone and TELE AID transmitter/receiver, D2B
Telephone transmitter and receiver unit, D2B
Telephone interface
E-net compensator
up to 31.5.01, Japan version: E-call control unit
7.5
34up to 31.3.04: Front passenger front seat adjustment control unit with memory
as of 1.4.04: Passenger-side front seat adjustment control unit with memory
up to 31.5.03, Taxi: Special vehicle multifunction control unit
as of 1.6.03, Taxi: Special vehicle multifunction control unit
as of 1.6.01, Police: Special vehicle multifunction control unit
15
34as of 1.4.04: Front passenger front seat adjustment control unit with memory
as of 1.4.04, Taxi: Special vehicle multifunction control unit
30
35up to 31.3.04 : STH heater unit30
35as of 1.4.04 : STH heater unit 20
36up to 31.3.04, Police:  Interior socket 30
36Valid for engine (612.990) (up to 29.2.04): Charge air cooler circulation pump
as of 1.4.04, Japan version: Audio gateway control unit
15
36Universal Portable CTEL Interface (UPCI [UHI]) control unit 7.5
37Charge air cooler circulation pump
up to 29.2.04: Brake booster vacuum pump control unit
25
38up to 29.2.04:Passenger-side front seat adjustment control unit with memory
as of 1.4.04, Police:Special vehicle multifunction control unit (SVMCU [MSS])
30
39Spare30
40Passenger-side front seat adjustment control unit with memory
Universal Portable CTEL Interface (UPCI [UHI]) control unit
Cell phone separation point
Telephone interface
E-net compensator
as of 1.6.01, MB standard telephone: Telephone transmitter and receiver unit, D2B
as of 1.6.01, TELE AID: Telephone and TELE AID transmitter/receiver, D2B
as of 1.6.01, Canadian vehicles: Via the trunk lid/FFS [RBA] separation point the trunk lid emergency release switch and the rear SAM control unit with fuse and relay module
USA version: Via the trunk lid/FFS [RBA] separation point the trunk lid emergency release switch and the rear SAM control unit with fuse and relay module
as of 1.4.04, Japan version: E-call control unit
7.5
40up to 31.5.01:  Special vehicle multifunction control unit30
41HEAT control and operating unit
up to 31.5.01:
AAC [KLA] control and operating unit
Comfort AAC [kLa] control and operating unit
7.5
41as of 1.6.01:
AAC [KLA] control and operating unit
Comfort AAC [KLA] control and operating unit
15
42Instrument cluster7.5

Engine Compartment Fuse Box

The fuse box is located in the engine compartment (left-side), under the coverThe location of the fuses in the engine compartment: Mercedes-Benz C-Class (2000-2007)

Fuse box diagramUnder-hood fuse box diagram: Mercedes-Benz C-Class (2000-2007)

Assignment of the fuses and relay in the Engine Compartment Fuse Box
Circuit protectedA
43aFanfare horn relay15
43bFanfare horn relay15
44Telephone and TELE AID transmitter/ receiver, D2B
Telephone transmitter and receiver unit, D2B
Cell phone separation point
5
45Restraint systems control unit7.5
46Wiper ON/OFF relay
Wiper speed 1 and 2 relay
40
47Glove compartment illumination with switch Front cigar lighter (with illumination)15
48Valid for engine 612.990 (up to 31.3.04): Brake booster vacuum pump control unit
Valid for engine 112 and engine 113: Circuit 15 connector sleeve (fused)
Valid for engine 646, USA version (up to 31.3.04): Circuit 30 connector sleeve
Valid for engine 646 (as of 1.4.04): O 2 sensor upstream of TWC [kAt] connector
15
49Restraint systems control unit7.5
50Light switch module
Valid for engine 612.990: Glow output stage (up to 31.3.04), Hot film mass air flow sensor (1.4.04 up to 30.11.04)
5
51AAC with integrated control additional fan motor
Instrument cluster
Valid for code (581) comfort automatic air conditioning: C-AAC [K-KLA] multifunction sensor, C-AAC [K-KLA] sun sensor (4 in total), Left front lamp unit, Right front lamp unit
Valid for AMG vehicles: Charge air cooler circulation pump
Valid for model 203.0 (up to 31.7.01): SPS [PML] control unit
7.5
52Starter15
53Starter relay
Rear SAM control unit with fuse and relay module
Valid for engine 611/612/642/646: CDI control unit
25
53Valid for gasoline engines:
Starter relay
Rear SAM control unit with fuse and relay module
Valid for engine 111/271/272: ME-SFI [ME] control unit
Valid for engine 112/113:
ME-SFI [ME] control unit
Circuit 87M1e connector sleeve
15
54Valid for engine 271.940:
ME-SFI [ME] control unit
Purge control valve (USA version)
Activated charcoal canister shutoff valve
Valid for engine 271.942: NOX (nitrogen oxides) control unit
Valid for engine 642/646: CDI control unit
Valid for engine 642/646: Circuit 30 connector sleeve
15
54Valid for engines 611/612: CDI control unit
Valid for engine 611/612 (up to 30.11.04): Vent line heater element
7.5
55Steering angle sensor
Distronic: DTR control unit
Valid for transmission 722:
ETC [EGS] control unit (up to 31.5.04)
Electronic selector lever module control unit
Electric controller unit (VGS)
Valid for transmission 716:
Gear recognition switch
Automated manual transmission control unit
7.5
56ESP and BAS control unit
Stop light switch
5
57Steering angle sensor (up to 31.5.02)
EIS [EZS] control unit
Steering column module (as of 1.6.02)
Valid for engine 112/113: ME-SFI [ME] control unit
5
58Valid for transmission 716: SEQ hydraulic pump40
59ESP and BAS control unit50
60ESP and BAS control unit40
61Valid for transmission 716: Automated manual transmission control unit15
62Data link connector
Light switch module
Stop light switch
5
63Light switch module5
64Radio
Radio and navigation unit
COMAND operating, display and control unit
10
65Valid for engine 112/113: Electric air pump40
Relay
IFanfare horn system relay
KTerminal 87 relay, chassis
LWiper speed 1 and 2 relay
MTerminal 15R relay
NSEQ [ASG] pump control relay (with Sequentronic automated manual transmission (ASG))
OAir pump relay (engines 112, 113, 271 only)
PTerminal 15 relay
QWiper ON/OFF relay
RTerminal 87 relay, engine
SStarter relay

Front Prefuse Box

Front Prefuse Box
Circuit protectedA
1Interior fusebox125
2Luggage fusebox200
3Additional fuse holder 1, spare wheel well125
4Engine fusebox200
5Engine and AC electric suction fan with integrated control
Valid for diesel engines: Glow output stage
125
6Engine fusebox60

Luggage Compartment Fuse Box

The fuse box is located in the luggage compartment (on the left-side), under the cover

Fuse box diagram

Assignment of the fuses and relay in the trunk
Circuit protectedA
1Front passenger front seat adjustment control unit with memory
Front passenger partially-electric seat adjustment switch
30
2Driver front seat adjustment control unit with memory
Driver partially-electric seat adjustment switch
30
3Dome lamp
Right luggage compartment lamp
Left luggage compartment lamp
STH radio remote control receiver
7.5
3TV tuner (up to 29.2.04)
TV tuner (MOST) (as of 1.4.04)
20
4Fuel pump relay (N10/2kA)20
5Valid for engine 112.961 (up to 31.3.04): Charge air cooler circulation pump

Valid without engine 112.961: Backup relay 2
20
6Spare25
7Backup relay 17.5
8Amplifier module, window antenna
Alarm signal horn (H3) ATA [EDW] inclination sensor
7,5
9Overhead control panel control unit25
10Heated rear window40
11Spare20
12Interior socket
Valid for model 203.0 USA version (up to 31.3.04): Power outlet
15
13Multicontour seat pneumatic pump
Voice control system control unit
Rear dome lamp
Rear dome lamp PTS warning indicator
PTS control unit
Japan version: VICS+ETC voltage supply separation point.
5
14Tailgate wiper motor15
15Fuel filler cap polarity change relay 1
Fuel filler cap polarity change relay 2
10
16Voice control system control unit20
17Trailer recognition control unit20
18Trailer hitch socket (13-pin)20
19Multicontour seat pneumatic pump20
20Rear window roller blind relay
Valid for model 203.2/7 USA version: Power outlet
15
Relay
AFuel pump relay
BRelay 2, terminal 15R
CReserve relay 2
DReserve relay 1
ERear window defroster relay
FRelay 1, terminal 15R
GFiller cap relay, polarity reverser 1
HFiller cap relay, polarity reverser 2
Mercedes-Benz C-Class (W203; 2000-2007) fuses and relays December 16, 2018 admin