Mercedes W205 is the fourth generation of C-class cars of the German automaker Mercedes-Benz, which was produced in 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 with various body options: S205 wagon, w205 sedan, c205 coupe and A205 convertible. During this time, the model has been restyled. In this publication you can find a description of the fuses and relays Mercedes w205 with box diagrams, photos – examples of performance and locations. Select the fuse responsible for the cigarette lighter.
The execution of the boxes and the purpose of the elements in them may differ from those presented and depend on the year of manufacture and the level of equipment of your car.
Contents
Passenger compartment
Fuse box in panel
In the cabin, the fuse and relay box is located on the left side of the dashboard (on the parent side) behind a protective cover.
Diagram
Assignment
| 200 | 50A Front control unit SAM |
| 201 | 40A Front SAM control unit |
| 202 | 5A Alarm Siren |
| A205: EDW/Towing protection/Interior monitor control unit | |
| 203 | 20A Valid for vehicles with gearbox 716: Electric steering column lock control unit |
| 204 | 5A Diagnostic connector |
| 205 | 7.5A Electronic ignition lock control unit |
| 206 | 5A Analog clock |
| 207 | 15A Heating, ventilation and air conditioning control unit |
| 208 | 7.5A Instrument cluster |
| 209 | 5A Air conditioning control panel |
| Upper Control Panel Control Box | |
| 210 | 5A Signals from the steering column electronic module control unit |
| 211 | 25A AMG: Signals from the ESP control unit |
| 212 | 5A Antenna switch for telephone and auxiliary heater |
| 213 | 5A Signals from the ESP control unit |
| 214 | 30A AMG: Electric parking brake control unit |
| 215 | Reserve |
| 216 | 7.5A Glove box light |
| 217 | 5A Japan: DSRC toll data transmission control unit |
| 218 | 7.5A Supplemental Restraint System control unit |
| 219 | 5A Weight Sensing System control unit |
| 220 | Reserve |
| Relay | |
| F | Relay terminal 15R |
Power fuse box
A high power fuse box can be installed at the feet of the front passenger.
Diagram
Designation
- Engine compartment power fuse box
- 150A Hybrid: Additional battery relay for ECO Start-Stop function
- 40A Fan regulator
- Reserve
- 150A Vehicles with diesel engine: Electrical auxiliary heater
- 80A Right A-pillar fuse box
- 150A Rear fuse and relay module
- Reserve
- Reserve
- 60A Valid for vehicles with 725 gearbox: Fully integrated gearbox control unit 100A Hybrid with 724 gearbox: Fully integrated gearbox control unit
- Reserve
- 40A Rear fuse and relay module
- 50A Right A-pillar fuse box
- F32/4k2 – Closed current breaking relay
Location of additional elements
- F96 – Fuses terminal 30 additional battery
- F96 / 1 – Fuses terminal 87 damper in the exhaust tract
Box under the panel
Under the instrument panel, on the passenger side, on the rack behind the protective cover, there is another fuse box.
Photo – example
Diagram
Allocation
| 301 | 5A Hybrid: Ignition fuse (F63) via high voltage cut-off device |
| 302 | 30A Front right door control unit |
| 303 | 30A Rear left door control unit |
| 304 | 20A Valid for vehicles with gearbox 722: Servo drive module for automatic gearbox for DIRECT SELECT system |
| 305 | 30A Driver’s seat control unit |
| Driver’s seat heating control unit (up to 05/31/2015) | |
| Front seat heating control unit (from 06/01/2015) | |
| 306 | 30A Front passenger seat control unit |
| Front passenger seat heating control unit (until 05/31/2015) | |
| Front seat heating control unit (from 06/01/2015) | |
| 307 | Reserve |
| 308 | 30A USA: Electrical plug connection for the Elektric-Brake-Control function |
| 309 | 10A Emergency call system control unit |
| 5A HERMES control unit | |
| Telecom Services Communication Module | |
| 310 | Reserve |
| 311 | 10A Electronic controller for additional rear fan |
| 312 | 10A Ceiling Control Panel |
| 313 | 10A Hybrid: DC voltage converter control unit |
| 314 | Reserve |
| 315 | 5A Transmission control unit |
| On vehicles with diesel engine: CDI control unit | |
| On vehicles with petrol engine: ME control unit | |
| 316 | 7.5A Supplemental Restraint System control unit |
| 317 | 30A Panoramic sliding sunroof control module (panoramic sliding sunroof) |
| Sliding sunroof control module (sliding sunroof) | |
| 318 | 20A Auxiliary heater control unit |
| 319 | 5A Hybrid: High voltage electric heater system |
| 320 | 15A AIR BODY CONTROL |
| 321 | 5A Japan: DSRC Toll Communications Control Unit |
| 322 | 20A Head Unit |
| 323 | 5A Parking assistance control unit |
| MF1/1 | 7.5A Audio/COMAND Display |
| Audio fan motor (COMAND APS) | |
| MF1/2 | 7.5A Mono multifunction camera |
| Multifunctional stereo camera | |
| MF1/3 | 7.5A Rain and light sensor with additional functions |
| Ceiling Control Panel | |
| MF1/4 | 7.5A Driver’s seat control unit |
| Driver’s seat heating control unit (up to 05/31/2015) | |
| Front seat heating control unit (from 06/01/2015) | |
| MF1/5 | 7.5A Front passenger seat control unit |
| Front passenger seat heating control unit (until 05/31/2015) | |
| Front seat heating control unit (from 06/01/2015) | |
| MF1/6 | 7.5A Signals from the steering column electronic module control unit |
| MF2/1 | 5A Front left seat belt reversible pretensioner |
| MF2/2 | 5A Audio control panel/ COMAND |
| Touch panel (Audio 20 or COMAND APS radio) | |
| MF2/3 | 5A Front right seat belt reversible pretensioner |
| MF2/4 | 5A Head-up display |
| MF2/5 | 5A Media connection module |
| MF2/6 | 5A Hybrid: Electric air conditioner compressor |
| MF3/1 | 5A Front SAM terminal 30g readback wire |
| MF3/2 | 5A Radar control unit |
| MF3/3 | Reserve |
| MF3/4 | 5A Button block on the instrument panel on the driver’s side |
| MF3/5 | 5A Rear air conditioning control panel |
| MF3/6 | 5A Tire pressure monitoring control unit |
Engine compartment
Fuse and relay box
In the engine compartment, under the hood on the left side is the main fuse and relay box.
Location
Diagram
Appointment
| 100 | 40A Hybrid: Vacuum pump |
| 101 | 15A Except AMG: Cable termination terminal 87/2 |
| 20A AMG: Cable termination terminal 87/2 | |
| 102 | 20A Except AMG: Cable termination terminal 87/1 |
| 25A AMG: Cable termination terminal 87/1 | |
| 103 | 15A Except AMG: Cable termination terminal 87/4 |
| 20A AMG: Cable termination terminal 87/4 | |
| 104 | 15A Except AMG: Cable termination terminal 87/3 |
| 20A AMG: Cable termination terminal 87/3 | |
| 105 | 15A Valid for vehicles with reduction gear 722.9 (except 722.930): Control unit for auxiliary transmission oil pump |
| 106 | Reserve |
| 107 | 60A Valid for engine 274.9: Electric coolant pump |
| 108 | 20A LED static headlights: |
| Front right headlight | |
| High Performance LED or dynamic LED headlights: | |
| Front left headlight | |
| Front right headlight | |
| 109 | 30A Wiper motor |
| 110 | 20A LED static headlights: |
| Front left headlight | |
| High Performance LED or dynamic LED headlights: | |
| Front left headlight | |
| Front right headlight | |
| 111 | 30A Starter |
| 112 | 15A Hybrid: Accelerator position sensor |
| 113 | Reserve |
| 114 | 40A Compressor AIRMATIC |
| 115 | 15A Horn left and horn right |
| 116 | Reserve |
| 117 | Reserve |
| 118 | 5A Hybrid: Signals from the ESP control unit |
| 119 | 15A Cable termination terminal 87 C2 |
| 120 | 5A Except AMG: Cable termination terminal 87 C1 |
| 15A AMG: Cable termination terminal 87 C1 | |
| 121 | 5A Signals from the ESP control unit |
| 122 | 5A CPC Relay |
| 123 | Reserve |
| 124 | Reserve |
| 125 | 5A Front SAM control unit |
| 126 | 5A Transmission control unit |
| On vehicles with diesel engine: CDI control unit | |
| On vehicles with petrol engine: ME control unit | |
| 127 | 5A Hybrid: Voltage drop limiter |
| 128 | 5A Front left headlight and outdoor light switch |
| 129 | 30A Hybrid: Starter terminal 50 relay |
| 129A | 30A Hybrid: Starter terminal 50 relay |
| Relay | |
| G | Terminal 15 relay, engine compartment |
| H | Starter terminal 50 relay |
| I | Hybrid: Vacuum pump relay (+) |
| J | CPC relay |
| K | Valid for vehicles with gearbox 722.9 (except 722.930): Oil pump relay |
| L | Horn relay |
| M | Wiper heater relay |
| N | Relay terminal 87M |
| O | Hybrid: Starter terminal 15 relay |
| P | Valid for engine 274.9: Coolant pump relay |
| Q | Hybrid: Vacuum pump relay (-) |
| R | AIRMATIC relay |
Power fuse box
Photo example
Type 1
Diagram
Type 2
Diagram
Decoding
| 1 | Reserve |
| 2 | 100A On vehicles with diesel engine: Glow plug output stage module |
| 3 | 60A Engine fuse and relay module |
| 4 | Vehicle battery connector |
| 5 | 150A Engine fuse and relay module |
| 6 | 125A Fuse and relay module, left |
| 7 | 80A Fan motor |
| 8 | 125A Electric power steering control unit |
| 9 | 150A Fan motor (1000W) |
| 10 | 200A Power fuse box in passenger compartment |
| 11 | Reserve |
| 12 | Hybrid: Power electronics control unit |
| USA: Catalyst heater control unit | |
| 13 | 400A Generator |
| C1 | Hybrid: Trip Relay |
| C2 | Hybrid: Terminal 31 |
| C3/1 | 40A Signals from the ESP control unit |
| C3/2 | 60A Signals from the ESP control unit |
| F32/3k1 | Isolating relay |
Luggage compartment
Another fuse and relay box is located in the trunk under a protective cover.
Type 1
Diagram
Type 2
Diagram
Assignment
| 400 | 25A AdBlue® control unit |
| 401 | 15A AdBlue® control unit |
| 402 | 20A AdBlue® control unit |
| 403 | 30A Before 11/30/2015: Switch for partially electric seat adjustment, front passenger seat |
| 25A From 12/01/2015: Switch for partially electric seat adjustment, front passenger seat | |
| 404 | 30A Before 11/30/2015: Driver’s seat partially electric adjustment switch |
| 25A From 12/01/2015: Driver’s seat partially electric adjustment switch | |
| 405 | Reserve |
| 406 | 30A Front left door control unit |
| 407 | Reserve |
| 408 | 30A W205, S205, V205: Rear right door control unit |
| A205, C205: Rear compartment systems control unit | |
| 409 | Reserve |
| 410 | 15A Remote heater radio remote control receiver |
| 411 | 30A Front left seat belt reversible pretensioner |
| 412 | 7.5A Hybrid: Battery management system control unit |
| 413 | 5A Trunk lid actuator control unit |
| 414 | 5A Tuner module (TV tuner, digital radio (DAB)) or SIRIUS satellite radio) |
| 415 | 5A Camera cover control unit |
| Air Aroma Generator | |
| 416 | 7.5A Antenna Amplifier/ Mobile Phone Compensator |
| Mobile phone contact board | |
| 417 | 5A 360° Camera Control Unit |
| Rear View Camera | |
| 418 | 5A Seat heating control unit, rear |
| AIRSCARF system control unit | |
| 419 | 5A Lumbar support adjustment control unit for front passenger seat |
| 420 | 5A Lumbar adjustment control unit for driver’s seat |
| 421 | Reserve |
| 422 | Reserve |
| 423 | 5A Speaker amplifier control unit |
| 424 | 15A Valid for vehicles with engine 276: Motorsound control unit |
| 425 | Reserve |
| 426 | Reserve |
| 427 | Reserve |
| 428 | Reserve |
| 429 | Reserve |
| 430 | Reserve |
| 431 | 25A Multifunctional control unit for special vehicles |
| 432 | 25A Multifunctional control unit for special vehicles |
| 433 | 15A Trailer recognition control unit |
| 434 | 15A Trailer recognition control unit |
| 30A AMG: Electric parking brake control unit | |
| 435 | 25A Trailer recognition control unit |
| 25A AMG: Electronic differential control unit | |
| 436 | 15A Trailer recognition control unit |
| 437 | 25A Trailer recognition control unit |
| 438 | 30A AC/DC converter control unit |
| 439 | 5A Taximeter |
| Taximeter in interior rear-view mirror | |
| 25A A205: Rear compartment systems control unit | |
| 440 | 30A Seat heating control unit, rear |
| AIRSCARF system control unit | |
| 441 | 30A AIRSCARF system control unit |
| 442 | 25A Fuel pump control unit |
| 443 | 30A Front right seat belt reversible pretensioner |
| 444 | 15A Electric plug connection tablet computer |
| 445 | 15A S205: Socket in trunk |
| 446 | 15A Cigarette lighter with front ashtray illumination (socket in saloon) |
| 447 | 15A 12V socket in the center console, rear right |
| 448 | 10A Valid for vehicles with gearbox 722, 725: Park lock capacitor |
| 449 | 5A Valid for vehicles with engine 626: Fuel filter element with integrated heating |
| AMG: Electrical parking brake control unit | |
| 450 | 5A Rear control unit SAM |
| 451 | 5A Fuel pump control unit |
| AdBlue® control unit | |
| 452 | 5A Rear bumper integrated radar sensor outside right |
| Integrated radar sensor rear bumper outside left | |
| Radar sensor in the rear bumper in the center | |
| Radar sensor in the rear bumper on the right outside | |
| Radar sensor in the rear bumper on the left outside | |
| 453 | 5A Radar sensor in front bumper, left |
| Radar sensor in front bumper, right | |
| COLLISION PREVENTION ASSIST control module | |
| 454 | 7.5A Valid for vehicles with gearbox 722: Control unit for fully integrated automatic transmission control |
| 5A Package for driving schools: | |
| Footwell lighting switch | |
| Pedal control sensor | |
| Valid for type 253: AdBlue® control unit | |
| 455 | 5A AC/DC converter control unit |
| 456 | 5A Far field radar sensor front |
| Electrical control module DISTRONIC | |
| 457 | 5A Hybrid: |
| Power electronic equipment control unit | |
| Battery management system control unit | |
| AMG: | |
| Electronic differential control unit | |
| Active engine mount control unit | |
| 458 | 5A Module for keyless opening of the trunk lid under the rear bumper |
| 459 | 5A Hybrid: Charger |
| AMG: AMG chassis control unit | |
| 460 | 10A Control unit kEyLESS-GO |
| 461 | 5A Antenna amplifier FM 1, AM, CL and KEYLESS-GO |
| 462 | 40A Speaker amplifier control unit |
| 463 | 30A W205, S205, V205: Heated rear window (R1) via rear window anti-interference capacitor |
| A205, C205: Electrical connector for soft top/vehicle interior | |
| 464 | 40A Trunk lid actuator control unit |
| Tailgate Actuator Control Module | |
| 465 | 40A Rear control unit SAM |
| 466 | 40A Rear control unit SAM |
| 467 | 40A Valid for vehicles with 626 engine: Fuel filter element with integrated heating |
| A205: Rear compartment systems control unit | |
| Relay | |
| S | Salon terminal 15 relay |
| T | Heated rear window relay |
| U | 2nd row cup holder and socket relay |
| В | AdBlue® relay |
| X | Relay for refrigerator box and sockets of the 1st row of seats / trunk |
| Y | Backup relay |
| ZR1 | Valid for vehicles with engine 626: Fuel filter heating relay |
| ZR2 | Backup relay |
| ZR3 | Backup relay |
Fuses 445, 446 and 447 are responsible for the cigarette lighters.
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If you have any questions – write in the comments.
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Gud information
Hi everyone. I have a C300 T-Model S205 car. I have bought a dash cam that has to be connected with 3 wires (Ground, Battey, ACC). I have faced the following problem: fuse scheme does not correspond to a fuse box (in panel) real situation. Same as here on the pictures. According scheme the right part of the fuse box 214 to 217 are the one I am looking for (has no permanent power supply, ideal for ACC) but they are missing. The fuse places 214 to 217 are cutten off, same as here on the picture. How is it possible? The left side has permanent power supply. According scheme I would use fuse 216 for ACC connection, but it is missing… Any suggestions?
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