2000-2007 Mercedes C-Class (W203) Fuse Box Diagram
Luggage compartment fuse box
- Trim panel
- Cover of auxiliary fuse box
- Special fuse extractor
| No. | A | Description |
|---|---|---|
| 1 | 30 | Front passenger front seat adjustment control unit with memory
Front passenger partially-electric seat adjustment switch |
| 2 | 30 | Driver front seat adjustment control unit with memory
Driver partially-electric seat adjustment switch |
| 3 | 7.5 | Dome lamp
Right luggage compartment lamp Left luggage compartment lamp STH radio remote control receiver |
| 20 | TV tuner (→29.02.2004)
TV tuner (MOST) (01.04.2004→) |
|
| 4 | 20 | Fuel pump relay |
| 5 | 20
|
M112.961 (→31.03.2004): Charge air cooler circulation pump |
| 20 | except M112.961: Backup relay 2 | |
| 6 | 25 | Spare |
| 7 | 7.5 | Backup relay 1 |
| 8 | 7.5 | Amplifier module, window antenna
Alarm signal horn (H3) ATA [EDW] inclination sensor |
| 9 | 25 | Overhead control panel control unit |
| 10 | 40 | Heated rear window |
| 11 | 20 | Spare |
| 12 | 15 | Interior socket / Power outlet |
| 13 | 5 | Multicontour seat pneumatic pump
Voice control system control unit Rear dome lamp Rear dome lamp PTS warning indicator PTS control unit VICS+ETC voltage supply separation point (Japan) |
| 14 | 15 | Tailgate wiper motor |
| 15 | 10 | Fuel filler cap polarity change relay 1
Fuel filler cap polarity change relay 2 |
| 16 | 20 | Voice control system control unit |
| 17 | 20 | Trailer recognition control unit |
| 18 | 20 | Trailer hitch socket (13-pin) |
| 19 | 20 | Multicontour seat pneumatic pump |
| 20 | 15 | Rear window roller blind relay |
| 15 | W203.2/7 (USA): Power outlet | |
| Relay | ||
| A | Fuel pump | |
| B | Relay 2, terminal 15R | |
| C | Reserve relay 2 | |
| D | Reserve relay 1 | |
| E | Rear window defroster | |
| F | Relay 1, terminal 15R | |
| G | Filler cap, polarity reverser 1 | |
| H | Filler cap, polarity reverser 2 | |
Gasoline:
- C180 - 2.0L (M111 E20 EVO)
- C180 Kompressor - 1.8L (M271 E18 ML LR)
- C200 Kompressor - 2.0L (M111 E20 ML EVO) or 1.8L (M271 E18 ML)
- C200 CGI - 1.8L (M271 18 DE ML)
- C230 Kompressor - 1.8L (M271 E18 ML)
- C230 - 2.5L (M272 E25)
- C240 - 2.6L (M112 E26)
- C280 - 3.0L (M272 E30)
- C320 - 3.2L (M112 E32)
- C350 - 3.5L (M272 E35)
- C32 AMG - 3.2L (M112 E32 ML)
- C55 AMG - 5.5L (M113 E55)
Diesel:
- C200 CDI - 2.1 / 2.2L (OM611, OM646)
- C220 CDI - 2.1 / 2.2L (OM 611, OM 646)
- C270 CDI - 2.7L (OM612)
- C30 CDI AMG - 3.0L (OM612)
- C320 CDI - 3.0L (OM642)
The instrument panel fuse panel
- Pull cover (1) open with a screw driver or similar tool.
- Remove cover rearward.
| No. | A | Description |
|---|---|---|
| 21 | 30 | Left front door control unit |
| 22 | 30 | Right front door control unit |
| 23 | 15
|
→30.11.2004: Central gateway control unit |
| 24 | 7.5 | CD player with changer (in glove compartment) |
| 25 | 30 | Upper control panel control unit |
| 26 | 25 | Sound amplifier |
| 27 | 30 | Driver-side front seat adjustment control unit, with memory
Special vehicle multifunction control unit (SVMCU [MSS]) |
| 28 | 30 | Spare |
| 29 | 30 | Driver-side front seat adjustment control unit, with memory
Driver-side front seat adjustment control unit, with memory Special vehicle multifunction control unit |
| 30 | 40 | Heating systems recirculation unit |
| 31 | 20 | EIS [EZS] control unit
Electric steering lock control unit |
| 32 | 30 | Left rear door control unit |
| 33 | 30 | Right rear door control unit |
| 34 | 7.5 | Cell phone separation point
→31.5.2001: Telephone and TELE AID transmitter/receiver, D2B Telephone transmitter and receiver unit, D2B Telephone interface E-net compensator →31.5.2001 (Japan version): E-call control unit |
| 15
|
→31.03.2004: Front passenger front seat adjustment control unit with memory
01.04.2004→: Passenger-side front seat adjustment control unit with memory Taxi, Police: Special vehicle multifunction control unit |
|
| 30
|
01.04.2004: Front passenger front seat adjustment control unit with memory
01.04.2004→ (Taxi): Special vehicle multifunction control unit |
|
| 35 | 30
|
→31.03.2004: STH heater unit |
| 20
|
01.04.2004→: STH heater unit | |
| 36 | 30
|
→31.03.2004 (Police): Interior socket |
| 15
|
OM612.990 (→29.02.2004): Charge air cooler circulation pump
01.04.2004→ (Japan): Audio gateway control unit |
|
| 7.5 | Universal Portable CTEL Interface (UPCI [UHI]) control unit | |
| 37 | 25 | Charge air cooler circulation pump
→29.02.2004: Brake booster vacuum pump control unit |
| 38 | 30
|
→29.02.2004: Passenger-side front seat adjustment control unit with memory
01.04.2004→ (Police): Special vehicle multifunction control unit (SVMCU [MSS]) |
| 39 | 30 | Spare |
| 40 | 7.5 | Passenger-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 01.06.2001→ (standard telephone): Telephone transmitter and receiver unit, D2B 01.06.2001→ (TELE AID): Telephone and TELE AID transmitter/receiver, D2B 01.06.2001→ (Canada): 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: 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 01.04.2004→ (Japan): E-call control unit |
| 30
|
→31.05.2001: Special vehicle multifunction control unit | |
| 41 | 7.5 | HEAT control and operating unit
→31.05.2001: AAC [KLA] control and operating unit Comfort AAC [kLa] control and operating unit |
| 15
|
01.06.2001→:
AAC [KLA] control and operating unit Comfort AAC [KLA] control and operating unit |
|
| 42 | 7.5 | Instrument cluster |
Engine compartment fuse box
The fuse box is located in the engine compartment on the left hand side.
- Twist screws (1) 90° counter clockwise.
- Pull up cover (2)
- Slide out retainer (3) and remove cover by pulling towards front.
- Install cover (2) in reverse order.
- Release clamps (5)
- Remove cover (4)
| No. | A | Description |
|---|---|---|
| 43a | 15 | Fanfare horn relay |
| 43b | 15 | Fanfare horn relay |
| 44 | 5 | Telephone and TELE AID transmitter/ receiver, D2B
Telephone transmitter and receiver unit, D2B Cell phone separation point |
| 45 | 7.5 | Restraint systems control unit |
| 46 | 40 | Wiper ON/OFF relay
Wiper speed 1 and 2 relay |
| 47 | 15 | Glove compartment illumination with switch
Front cigar lighter (with illumination) |
| 48 | 15
|
OM612.990 (→31.03.2004): Brake booster vacuum pump control unit
M112, M113: Circuit 15 connector sleeve (fused) OM646 (USA →31.03.2004): Circuit 30 connector sleeve OM646 (01.04.2004→): O2 sensor upstream of TWC [kAt] connector |
| 49 | 7.5 | Restraint systems control unit |
| 50 | 5 | Light switch module
OM612.990 Glow output stage (→31.03.2004) Hot film mass air flow sensor (01.04.2004-30.11.2004) |
| 51 | 7.5 | AAC with integrated control additional fan motor
Instrument cluster 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 AMG: Charge air cooler circulation pump W203.0 (→31.07.2001): SPS [PML] control unit |
| 52 | 15 | Starter |
| 53 | 25 | Diesel engines:
Starter relay Rear SAM control unit with fuse and relay module OM611, OM612, OM642, OM646: CDI control unit |
| 15
|
Gasoline engines:
Starter relay Rear SAM control unit with fuse and relay module M111, M271, M272: ME-SFI [ME] control unit M112, M113: ME-SFI [ME] control unit Circuit 87M1e connector sleeve |
|
| 54 | 15
|
M271.940:
ME-SFI [ME] control unit Purge control valve (USA version) Activated charcoal canister shutoff valve M271.942: NOX (nitrogen oxides) control unit OM642, OM646: CDI control unit OM642, OM646: Circuit 30 connector sleeve |
| 7.5
|
OM611, OM612: CDI control unit
OM611, OM612: Vent line heater element (→30.11.04) |
|
| 55 | 7.5 | Steering 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 |
| 56 | 5 | ESP and BAS control unit
Stop light switch |
| 57 | 5 | Steering angle sensor (up to 31.5.02)
EIS [EZS] control unit Steering column module (as of 1.6.02) M112, M113: ME-SFI [ME] control unit |
| 58 | 40
|
Valid for transmission 716: SEQ hydraulic pump |
| 59 | 50 | ESP and BAS control unit |
| 60 | 40 | ESP and BAS control unit |
| 61 | 15
|
Valid for transmission 716: Automated manual transmission control unit |
| 62 | 5 | Data link connector
Light switch module Stop light switch |
| 63 | 5 | Light switch module |
| 64 | 10 | Radio
Radio and navigation unit COMAND operating, display and control unit |
| 65 | 40
|
M112, M113: Electric air pump |
| Relay | ||
| I | Fanfare horn system | |
| K | Terminal 87, chassis | |
| L | Wiper speed 1 and 2 | |
| M | Terminal 15R | |
| N | SEQ [ASG] pump control (with Sequentronic automated manual transmission (ASG)) | |
| O | M112, M113, M271: Air pump | |
| P | Terminal 15 | |
| Q | Wiper ON/OFF | |
| R | Terminal 87 relay, engine | |
| S | Starter | |
Front prefuse box
| No. | A | Description |
|---|---|---|
| 1 | 125 | Interior fuse box |
| 2 | 200 | Rear SAM control unit with fuse and relay module |
| 3 | 125 | Additional fuse holder l, spare wheel well |
| 4 | 200 | Front SAM control unit with fuse and relay module |
| 5 | 125 | Engine and AC electric suction fan with integrated control
Diesel: Glow output stage |
| 6 | 60 | Front SAM control unit with fuse and relay module |