Updated on Reading Time: 5 minutes
Do you need to find the Fuses and Relays on your Mercedes-Benz C-Class W205? Follow the procedures below to learn how to locate the fuse boxes of your Mercedes-Benz.
Repair Time: 5
The typical time range in hours required to complete this repair.
Repair Cost: 2
The average repair cost range in USD to complete this repair by either an honest mechanic or as a DIY. Including the cost of parts but not tools.
Repair Difficulty:
This indicates how difficult it is for most DIYers and mechanics to perform this repair.
Interior Driver’s Side Fuses
This fuse box is located on the driver’s side of the dashboard.
| Location | System | Ampere |
|---|---|---|
| 200 | Front SAM control unit | 50 |
| 201 | Front SAM control unit | 40 |
| 202 | Alarm siren | 5 |
| 203 | Electric steering lock control unit | 20 |
| 204 | Diagnostic connector | 5 |
| 205 | Electronic ignition lock control unit | 7.5 |
| 206 | Analog clock | 5 |
| 207 | Climate control unit | 15 |
| 208 | Instrument cluster | 7.5 |
| 209 | Climate control operating unit | 5 |
| 210 | Steering column tube module control unit | 5 |
| 211 | Electronic Stability Program control unit | 25 |
| 212 | Antenna changeover switch for telephone and stationary heated | 5 |
| 213 | Electronic Stability Program control unit | 5 |
| 214 | Electric parking brake control unit | 30 |
| 215 | Not Used | – |
| 216 | Glove compartment lamp | 7.5 |
| 217 | Dedicated Short-Range Communications control unit | 5 |
| 218 | Supplemental Restraint System control unit | 7.5 |
| 219 | Weight sensing system (WSS) control unit | 5 |
| 220 | Not Used | – |
| F Relay | Relay, circuit 15R |
Front Passenger Footwell
These fuses are located in the footwell on the passenger side.
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Remove the plastic cover to access the passenger fuses.
| Location | System | Ampere |
|---|---|---|
| 301 | Hybrid:Pyrofuse via high-voltage disconnect device | 5 |
| 302 | The right front door control unit | 30 |
| 303 | W205, S205, V205:Left rear door control unit | 30 |
| 304 | Valid for transmission 722:Intelligent servo module for DIRECT SELECT | 20 |
| 305 | Driver seat control unit, Heater | 30 |
| 306 | Front passenger seat control unit, Heater | 30 |
| 307 | AMG:Active engine mounts control unit | 5 |
| 308 | USA version:Electric Brake Control electrical connector | 30 |
| 309 | Emergency call system control unit | 10 |
| 310 | Active engine mounts control unit | 20 |
| 311 | Booster blower electronic blower regulator | 10 |
| 312 | Overhead control panel control unit | 10 |
| 313 | Power electronics control unit | 10 |
| 314 | The electronic differential control unit | 5 |
| 315 | Powertrain control unit | 5 |
| 316 | Supplemental Restraint System control unit | 7.5 |
| 317 | The panoramic sliding sunroof control module | 30 |
| 318 | The stationary heater control unit | 20 |
| 319 | High-voltage PTC heater | 5 |
| 320 | AIRMATIC control unit | 25 |
| 321 | Dedicated Short-Range Communications control unit | 5 |
| 322 | Head unit | 20 |
| 323 | Parking system control unit | 5 |
| MF1/1 | Audio/COMAND display | 7.5 |
| MF1/2 | Stereo multifunction camera | 7.5 |
| MF1/3 | Rain/light sensor with additional functions | 7.5 |
| MF1/4 | Driver seat control unit | 7.5 |
| MF1/5 | Front passenger seat control unit | 7.5 |
| MF1/6 | Steering column tube module control unit | 7.5 |
| MF2/1 | Left front reversible emergency tensioning retractor | 5 |
| MF2/2 | Audio/COMAND control panel | 5 |
| MF2/3 | Right front reversible emergency tensioning retractor | 5 |
| MF2/4 | Heads-up display | 5 |
| MF2/5 | Multimedia connection unit | 5 |
| MF2/6 | Hybrid:Electrical refrigerant compressor | 5 |
| MF3/1 | Feedback line, terminal 30g, front SAM control unit | 5 |
| MF3/2 | Radar sensors control unit | 5 |
| MF3/3 | Spare | – |
| MF3/4 | Driver-side instrument panel button group | 5 |
| MF3/5 | Rear air conditioning operating unit | 5 |
| MF3/6 | Tire pressure monitor control unit | 5 |
Engine Bay Main Fuses
Main fuse box in the engine bay.
| Location | System | Ampere |
|---|---|---|
| 100 | Hybrid:Vacuum pump | 40 |
| 101 | Circuit 87/2 | 15 |
| 102 | Circuit 87/1 | 20 |
| 103 | Circuit 87/4 | 15 |
| 104 | Circuit 87/3 | 15 |
| 105 | Automatic transmission fluid auxiliary oil pump control unit | 15 |
| 106 | Spare | – |
| 107 | Electric coolant pump | 60 |
| 108 | LED headlamp | 20 |
| 109 | Wiper motor | 30 |
| 110 | Static LED headlamp | 20 |
| 111 | Starter | 30 |
| 112 | Accelerator pedal sensor | 15 |
| 113 | Spare | – |
| 114 | AIRmatic compressor | 40 |
| 115 | Left horn and right horn | 15 |
| 116 | Spare | – |
| 117 | Spare | – |
| 118 | Electronic Stability Program control unit | 5 |
| 119 | Circuit 87 C2 connector sleeve | 15 |
| 120 | Circuit 87 C1 connector sleeve | 5 |
| 121 | Electronic Stability Program control unit | 5 |
| 122 | CPC relay | 5 |
| 123 | Spare | – |
| 124 | Spare | – |
| 125 | Front SAM control unit | 5 |
| 126 | Powertrain control unit | 5 |
| 127 | Hybrid:Voltage dip limiter | 5 |
| 128 | Left front lamp unit and exterior lights switch | 5 |
| 129 | Starter circuit 50 relay | 30 |
| 129A | Starter circuit 50 relay | 30 |
| Relay | ||
| G | Engine compartment circuit 15 relay | |
| H | Starter circuit 50 relay | |
| I | Vacuum pump relay (+) | |
| J | CPC relay | |
| K | Oil pump relay | |
| L | Horn relay | |
| M | Wiper park position heater relay | |
| N | Circuit 87M relay | |
| O | Starter circuit 15 relay | |
| P | Coolant pump relay | |
| Q | Vacuum pump relay (-) | |
| R | AIRmatic relay |
Trunk Fuses
Fuse panel in the trunk area.
| Location | System | Ampere |
|---|---|---|
| 400 | BlueTEC:AdBluecontrol unit | 25 |
| 401 | BlueTEC:AdBluecontrol unit | 15 |
| 402 | BlueTEC:AdBluecontrol unit | 20 |
| 403 | Front passenger seat partially electric seat adjustment switch | 30 |
| 404 | Valid up to 30.11.2015:Driver seat partially electric seat adjustment switch | 30 |
| 405 | Not used | – |
| 406 | The left front door control unit | 30 |
| 407 | Not used | – |
| 408 | W205, S205, V205:Right rear door control unit | 30 |
| 409 | Not used | – |
| 410 | Stationary heater radio remote control receiver | 5 |
| 411 | Left front reversible emergency tensioning retractor | 30 |
| 412 | Hybrid:Battery management system control unit | 7.5 |
| 413 | Trunk lid control unit | 5 |
| 414 | Tuner unit | 5 |
| 415 | Camera cover control unit/ Perfume atomizer | 5 |
| 416 | Cellular telephone system antenna amplifier/compensator | 7.5 |
| 417 | 360° camera control unit/ Backup camera | 5 |
| 418 | Rear seat heater control unit/ Airscarf | 5 |
| 419 | Front passenger seat lumbar support adjustment control unit | 5 |
| 420 | Driver seat lumbar support adjustment control unit | 5 |
| 421 | Not used | – |
| 422 | Not used | – |
| 423 | Sound system amplifier control unit | 5 |
| 425 | Not used | – |
| 426 | Not used | – |
| 427 | Not used | – |
| 428 | Not used | – |
| 429 | Not used | – |
| 430 | Not used | – |
| 431 | Special-purpose vehicle multifunction control unit | 25 |
| 432 | Special-purpose vehicle multifunction control unit | 25 |
| 433 | Trailer recognition control unit | 15 |
| 434 | Trailer recognition control unit | 15 |
| 435 | Trailer recognition control unit | 25 |
| AMG:Electronic differential control unit | ||
| 436 | Trailer recognition control unit | 15 |
| 437 | Trailer recognition control unit | 25 |
| 438 | DC/AC converter control unit | 30 |
| 439 | Taximeter | 5 |
| 440 | Rear seat heater control unit / Airscarf Module | 30 |
| 441 | AIRSCARF control unit | 30 |
| 442 | Fuel system control unit | 25 |
| 443 | Right front reversible emergency tensioning retractor | 30 |
| 444 | Tablet PC electrical connector | 15 |
| 445 | S205:Luggage compartment socket | 15 |
| 446 | Front cigarette lighterwith ashtray illumination | 15 |
| 447 | Right rear center console socket 12V | 15 |
| 448 | Valid for transmission 722, 725:Park pawl capacitor | 10 |
| 449 | Valid for engine 626:Fuel filter element with integrated heater | 5 |
| 450 | Rear SAM control unit | 5 |
| 451 | Fuel system control unit | 5 |
| 452 | The integrated outer right rear bumper radar sensor | 5 |
| 453 | The left front bumper radar sensor | 5 |
| 454 | Valid for transmission 722:Fully integrated transmission control unit | 7.5 |
| 455 | DC/AC converter control unit | 5 |
| 456 | The front long-range radar sensor | 5 |
| 457 | Hybrid: | 5 |
| 458 | Rear switching module | 5 |
| 459 | Hybrid:Charger | 5 |
| 460 | KEYLESS-GO control unit | 10 |
| 461 | FM 1, AM, CL [ZV] and KEYLESS-GO antenna amplifier | 5 |
| 462 | Sound system amplifier control unit | 40 |
| 463 | W205, S205, V205:Rear window heater via rear window interference suppression capacitor | 30 |
| 464 | Trunk lid control unit | 40 |
| 465 | Rear SAM control unit | 40 |
| 466 | Rear SAM control unit | 40 |
| 467 | Valid for engine 626:Fuel filter element with integrated heater | 40 |
| Relay | ||
| S | Vehicle interior circuit 15 relay | |
| T | Rear window heater relay | |
| U | 2nd seat row cup holder and sockets relay | |
| V | AdBluerelay | |
| X | 1 st seat row/trunk refrigerator box and sockets relay | |
| Y | Not used relay | |
| ZR1 | Fuel filter heater relay | |
| ZR2 | Reserve relay | |
| ZR3 | Reserve relay |
.
Engine Bay Pre Fuses
These are pre-fuses protecting critical circuits. Located near the battery.
Note the fuses on the side next to the battery as well.
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YOUCANIC Techs YOUCANIC articles are written by authors who collectively have over 60 years of experience in the automotive field and years of hands-on experience on vehicles. These authors are certified ASE G1 Automotive Maintenance engine professionals (the highest level certification for vehicle maintenance and repair). They hold associate’s and bachelor’s degrees, as well as having gone on to further study to receive a master’s and doctorate degrees. These authors collaborate on research, writing, editing, and fact-checking every article to ensure that it is accurate and up to date and delivers the best counsel and information to YOUCANIC readers. View all postsRush*t Hila is an engineer and ASE certified in G1 Automotive Maintenance 
