Mercedes-Benz w203 C-Class (2000 – 2007) – fuse box diagram
Year of production: 2001, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Luggage compartment fuse box
| No. |
Circuit protected |
A |
| 1 | Front passenger front seat adjustment control unit with memory Front passenger partially-electric seat adjustment switch |
30 |
| 2 | Driver front seat adjustment control unit with memory Driver partially-electric seat adjustment switch |
30 |
| 3 | Dome lamp Right luggage compartment lamp Left luggage compartment lamp STH radio remote control receiver |
7.5 |
| TV tuner (up to 29.2.04) TV tuner (MOST) (as of 1.4.04) |
20 | |
| 4 | Fuel pump relay (N10/2kA) | 20 |
| 5 | Valid for engine 112.961 (up to 31.3.04): Charge air cooler circulation pump Valid without engine 112.961: Backup relay 2 |
20 |
| 6 | Spare | 25 |
| 7 | Backup relay 1 | 7.5 |
| 8 | Amplifier module, window antenna Alarm signal horn (H3) ATA [EDW] inclination sensor |
7,5 |
| 9 | Overhead control panel control unit | 25 |
| 10 | Heated rear window | 40 |
| 11 | Spare | 20 |
| 12 | Interior socket Valid for model 203.0 USA version (up to 31.3.04): Power outlet |
15 |
| 13 | Multicontour 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 |
| 14 | Tailgate wiper motor | 15 |
| 15 | Fuel filler cap polarity change relay 1 Fuel filler cap polarity change relay 2 |
10 |
| 16 | Voice control system control unit | 20 |
| 17 | Trailer recognition control unit | 20 |
| 18 | Trailer hitch socket (13-pin) | 20 |
| 19 | Multicontour seat pneumatic pump | 20 |
| 20 | Rear window roller blind relay Valid for model 203.2/7 USA version: Power outlet |
15 |
| Relay | ||
| A | Fuel pump relay | |
| B | Relay 2, terminal 15R | |
| C | Reserve relay 2 | |
| D | Reserve relay 1 | |
| E | Rear window defroster relay | |
| F | Relay 1, terminal 15R | |
| G | Filler cap relay, polarity reverser 1 | |
| H | Filler cap relay, polarity reverser 2 | |
The instrument panel fuse panel
| No. |
Circuit protected |
A |
| 21 | Left front door control unit | 30 |
| 22 | Right front door control unit | 30 |
| 23 | Up to 30.11.04: Central gateway control unit | 15 |
| 24 | CD player with changer (in glove compartment) | 7.5 |
| 25 | Upper control panel control unit | 30 |
| 26 | Sound amplifier | 25 |
| 27 | Driver-side front seat adjustment control unit, with memory Special vehicle multifunction control unit (SVMCU [MSS]) |
30 |
| 28 | Spare | 30 |
| 29 | Driver-side front seat adjustment control unit, with memory Driver-side front seat adjustment control unit, with memory Special vehicle multifunction control unit |
30 |
| 30 | Heating systems recirculation unit | 40 |
| 31 | EIS [EZS] control unit Electric steering lock control unit |
20 |
| 32 | Left rear door control unit | 30 |
| 33 | Right rear door control unit | 30 |
| 34 | Cell 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 |
| up 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 | |
| as 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 | |
| 35 | up to 31.3.04: STH heater unit | 30 |
| as of 1.4.04: STH heater unit | 20 | |
| 36 | up to 31.3.04, Police: Interior socket | 30 |
| Valid 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 | |
| Universal Portable CTEL Interface (UPCI [UHI]) control unit | 7.5 | |
| 37 | Charge air cooler circulation pump up to 29.2.04: Brake booster vacuum pump control unit |
25 |
| 38 | up 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 |
| 39 | Spare | 30 |
| 40 | 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 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 |
| up to 31.5.01: Special vehicle multifunction control unit | 30 | |
| 41 | HEAT control and operating unit up to 31.5.01: AAC [KLA] control and operating unit Comfort AAC [kLa] control and operating unit |
7,5 |
| as of 1.6.01: AAC [KLA] control and operating unit Comfort AAC [KLA] control and operating unit |
15 | |
| 42 | Instrument cluster | 7.5 |
Engine compartment fuse box
| No. |
Circuit protected |
A |
| 43a | Fanfare horn relay | 15 |
| 43b | Fanfare horn relay | 15 |
| 44 | Telephone and TELE AID transmitter/ receiver, D2B Telephone transmitter and receiver unit, D2B Cell phone separation point |
5 |
| 45 | Restraint systems control unit | 7.5 |
| 46 | Wiper ON/OFF relay Wiper speed 1 and 2 relay |
40 |
| 47 | Glove compartment illumination with switch Front cigar lighter (with illumination) |
15 |
| 48 | Valid 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): O2 sensor upstream of TWC [kAt] connector |
15 |
| 49 | Restraint systems control unit | 7.5 |
| 50 | Light 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 |
| 51 | AAC 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 |
| 52 | Starter | 15 |
| 53 | Valid for diesel engines: | |
| Starter relay Rear SAM control unit with fuse and relay module Valid for engine 611/612/642/646: CDI control unit |
25 | |
| Valid 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 | |
| 54 | Valid 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 |
| Valid for engines 611/612: CDI control unit Valid for engine 611/612 (up to 30.11.04): Vent line heater element |
7,5 | |
| 55 | 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 |
7.5 |
| 56 | ESP and BAS control unit Stop light switch |
5 |
| 57 | Steering 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 |
| 58 | Valid for transmission 716: SEQ hydraulic pump | 40 |
| 59 | ESP and BAS control unit | 50 |
| 60 | ESP and BAS control unit | 40 |
| 61 | Valid for transmission 716: Automated manual transmission control unit | 15 |
| 62 | Data link connector Light switch module Stop light switch |
5 |
| 63 | Light switch module | 5 |
| 64 | Radio Radio and navigation unit COMAND operating, display and control unit |
10 |
| 65 | Valid for engine 112/113: Electric air pump | 40 |
| Relay | ||
| I | Fanfare horn system relay | |
| K | Terminal 87 relay, chassis | |
| L | Wiper speed 1 and 2 relay | |
| M | Terminal 15R relay | |
| N | SEQ [ASG] pump control relay (with Sequentronic automated manual transmission (ASG)) | |
| O | Air pump relay (engines 112, 113, 271 only) | |
| P | Terminal 15 relay | |
| Q | Wiper ON/OFF relay | |
| R | Terminal 87 relay, engine | |
| S | Starter relay | |
Front prefuse box
| No. |
Circuit protected |
A |
| 1 | Interior fuse box | 125 |
| 2 | Rear SAM control unit with fuse and relay module | 200 |
| 3 | Additional fuse holder l, spare wheel well | 125 |
| 4 | Front SAM control unit with fuse and relay module | 200 |
| 5 | Engine and AC electric suction fan with integrated control Valid for diesel engines: Glow output stage |
125 |
| 6 | Front SAM control unit with fuse and relay module | 60 |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.