Table of Contents
This material discusses in detail the fuse diagrams of a Mercedes C-class car (second generation, in the bodies: S205 station wagon, W205 sedan, C205 coupe and A205 convertible): 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 of release .
Fuses numbered 445, 446 and 447 in the trunk block are responsible for protecting the electrical circuits of the cigarette lighters.
In the passenger compartment
There are three blocks responsible for protecting the electrical circuits of the car.
Power fuse box
Placed behind the trim at the passenger's feet.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Amps |
| 1 | Engine compartment power fuse box | |
| 2 | Hybrid: Additional battery relay for ECO Start-Stop function | 150 |
| 3 | Fan controller | 40 |
| 4 | Not used | - |
| 5 | Diesel: Additional electric heater | 150 |
| 6 | A-pillar fuse box, right | 80 |
| 7 | Fuse and relay module in the rear | 150 |
| 8 | Not used | - |
| 9 | Not used | - |
| 10 |
|
60 / 100 |
| 11 | Not used | - |
| 12 | Fuse and relay module in the rear | 40 |
| 13 | A-pillar fuse box, right | 50 |
| F32 4k2 |
Relay for quiescent current interruption | - |
Block at the end of the dashboard
It is located on the left side of the instrument panel (on the driver's side). To access the fuses, you need to remove the protective lining by prying it with a screwdriver.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Amps |
| F | Relay terminal 15R | - |
| 200 | Front SAM control unit | 50 |
| 201 | Front SAM control unit | 40 |
| 202 |
|
5 |
| 203 | Models with 716 gearbox: Electric steering column lock control unit | 20 |
| 204 | Diagnostic connector | 5 |
| 205 | Electronic ignition lock control unit | 7.5 |
| 206 | Analog clock | 5 |
| 207 | Heating, ventilation and air conditioning control unit | 15 |
| 208 | instrument cluster | 7.5 |
| 209 | Air conditioning control panel | 5 |
| 210 | Signals from the steering column electronic module control unit | 5 |
| 211 | AMG: Signals from the ESP control unit | 25 |
| 212 | Antenna switch for telephone and auxiliary heater | 5 |
| 213 | Signals from the ESP control unit | 5 |
| 214 | AMG: Electric parking brake control unit | 30 |
| 215 | Not used | - |
| 216 | Glove box light | 7.5 |
| 217 | Japan: DSRC toll data transmission control unit | 5 |
| 218 | Control unit for passenger restraint system (Supplemental Restraint System) | 7.5 |
| 219 | Weight Sensing System control unit | 5 |
| 220 | Not used | - |
Block on the rack under the dashboard
It is located on the passenger side between the instrument panel and the door. To access, remove the revision cover.
Photo is an example.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | Amps |
| MF1/1 | Audio Display / COMAND, Audio Fan Motor (COMAND APS) | 7.5 |
| MF1/2 | Multifunction camera | 7.5 |
| MF1/3 |
|
7.5 |
| MF1/4 | Front seat heating control unit (from 06/01/2015), Driver's seat heating control unit (until 05/31/2015) / Driver's seat control unit | 7.5 |
| MF1/5 | Front passenger seat heating control unit (up to 05/31/2015), Front passenger seat control unit, Front seat heating control unit (from 06/01/2015) | 7.5 |
| MF1/6 | Signals from the steering column electronic module control unit | 7.5 |
| MF2/1 | Reversible front left seat belt pretensioner | 5 |
| MF2/2 | Touch panel (Audio 20 radio or COMAND APS), Audio/COMAND control panel | 5 |
| MF2/3 | Reversible front right seat belt pretensioner | 5 |
| MF2/4 | Head-up display | 5 |
| MF2/5 | Media Connectivity Module | 5 |
| MF2/6 | Hybrid: Electric air conditioner compressor | 5 |
| MF3/1 | Front SAM control unit terminal 30g readback wire | 5 |
| MF3/2 | Radar control unit | 5 |
| MF3/3 | Not involved | - |
| MF3/4 | Buttons on the instrument panel on the driver's side | 5 |
| MF3/5 | Rear air conditioning control panel | 5 |
| MF3/6 | Tire pressure monitoring control unit | 5 |
| 301 | Hybrid: Ignition fuse (F63) for shutting down the high voltage network | 5 |
| 302 | Front right door control unit | 30 |
| 303 |
|
30 |
| 304 | Transmission 722: Servo drive module for automatic transmission for DIRECT SELECT | 20 |
| 305 | Front seat heating control unit (from 06/01/2015), Driver's seat heating control unit (until 05/31/2015), Driver's seat control unit | 30 |
| 306 |
|
30 |
| 307 | AMG: Active engine mount control unit | 5 |
| 308 | USA: Electrical plug connection of the Elektric-Brake-Control function | 30 |
| 309 | Emergency call system control unit | 10 |
| Telecommunication Services Communication Module, HERMES Control Unit | 5 | |
| 310 | AMG: Active engine mount control unit | 20 |
| 311 | Electronic controller for additional fan in the rear | 10 |
| 312 | Ceiling Control Panel | 10 |
| 313 | Hybrid: Power electronics control unit | 10 |
| 314 | AMG: Electronic differential control unit | 5 |
| 315 |
|
5 |
| 316 | Control unit for passenger restraint system (Supplemental Restraint System) | 7.5 |
| 317 | Sliding sunroof control module (panoramic sunroof) | 30 |
| 318 | Autonomous heater control unit | 20 |
| 319 | Hybrid: High voltage electric heater system | 5 |
| 320 | Adaptive damping system control unit, AIRMATIC control unit | 25 |
| 321 | Japan: DSRC toll communication control unit | 5 |
| 322 | Head device | 20 |
| 323 | Parking assistance control unit | 5 |
In the luggage compartment
The fuse box is located behind the floor covering.
| Diagram | ||
|---|---|---|
Type 1
|
||
Type 2
|
||
| No. | Amps | Description |
| S | Salon terminal relay No. 15 | |
| T | Heated rear window relay | |
| U | 2nd row cup holder and socket relay | |
| IN | AdBlue® system | |
| X | Relay for refrigerator box and sockets of the 1st row of seats / trunk | |
| Y | not used | |
| ZR1 | Models with 626 engine: fuel filter heating | |
| ZR2 | not used | |
| ZR3 | not used | |
| 400 | 25 | AdBlue® system |
| 401 | 15 | AdBlue® system |
| 402 | 20 | AdBlue® system |
| 403 | 30 | to 11/30/2015 Front passenger seat adjustment switch |
| 25 | as of 12/01/2015: Front passenger seat adjustment switch | |
| 404 | 30 | Before 11/30/2015: Driver seat adjustment switch |
| 25 | From 12/01/2015: Driver's seat adjustment switch | |
| 405 | - | Not involved |
| 406 | 30 | Front left door control unit |
| 407 | - | Not involved |
| 408 | 30 |
|
| 409 | - | Not involved |
| 410 | 15 | Remote radio remote control receiver for auxiliary heater |
| 411 | 30 | Reversible front left seat belt pretensioner |
| 412 | 7.5 | Hybrid: Battery management system control unit |
| 413 | 5 | Trunk lid drive control unit |
| 414 | 5 | Tuner module (TV tuner, digital radio (DAB)) or SIRIUS satellite radio) |
| 415 | 5 | Air Aroma Generator, Chamber Lid Control Unit |
| 416 | 7.5 | Mobile Phone Contact Board, Antenna Amplifier / Mobile Phone Compensator |
| 417 | 5 | Rear View Camera, 360° Camera Control Unit |
| 418 | 5 | AIRSCARF system control unit, Rear seat heating control unit |
| 419 | 5 | Adjusting the lumbar support for the front passenger seat |
| 420 | 5 | Driver's seat lumbar adjustment |
| 421 | - | Not involved |
| 422 | - | Not involved |
| 423 | 5 | Speaker amplifier control unit |
| 424 | 15 | Models with 276 engine: Motorsound control unit |
| 425 | - | Not involved |
| 426 | - | Not involved |
| 427 | - | Not involved |
| 428 | - | Not involved |
| 429 | - | Not involved |
| 430 | - | Not involved |
| 431 | 25 | Multifunction control unit for special vehicles |
| 432 | 25 | Multifunction control unit for special vehicles |
| 433 | 15 | Trailer recognition system |
| 434 | 15 | Trailer detection control unit |
| 30 | AMG: Electric parking brake control unit | |
| 435 | 25 | Trailer recognition system |
| 25 | AMG: Electronic differential control unit | |
| 436 | 15 | Trailer recognition system |
| 437 | 25 | |
| 438 | 30 | AC/DC converter control box |
| 439 | 5 | Taximeter, Taximeter in interior rear-view mirror |
| 25 | A205: Rear compartment systems control unit | |
| 440 | 30 | AIRSCARF system, rear seat heating control unit |
| 441 | 30 | AIRSCARF system control unit |
| 442 | 25 | Fuel pump control module |
| 443 | 30 | Reversible front right seat belt pretensioner |
| 444 | 15 | Tablet computer electrical plug connection |
| 445 | 15 | S205: Socket in trunk |
| 446 | 15 | 12V socket with front ashtray light (Mercedes 205 cigarette lighter fuse) |
| 447 | 15 | 12V socket in the rear of the passenger compartment on the right (center console) |
| 448 | 10 | Transmissions 722, 725: Park lock capacitor |
| 449 | 5 |
|
| 450 | 5 | Rear SAM control unit |
| 451 | 5 | AdBlue® system, Fuel pump control module |
| 452 | 5 | Radar sensors in the rear bumper: outer right and left, center |
| 453 | 5 | COLLISION PREVENTION ASSIST control module, radar sensors in front bumper: right, left |
| 454 | 7.5 | Transmission 722: Fully integrated automatic transmission control unit |
| 5 | Driving School Package: Pedal Sensor, Footwell Light Switch | |
| Type 253: AdBlue® control unit | ||
| 455 | 5 | AC/DC converter control unit |
| 456 | 5 | Electric control module DISTRONIC, Far-field radar sensor front |
| 457 | 5 | Hybrid: battery management system, power electronics control module |
| AMG: Active engine mount control unit, Electronic differential control unit | ||
| 458 | 5 | 5A Module for keyless opening of the trunk lid under the rear bumper |
| 459 | 5 | AMG: Chassis control unit AMG Hybrid: Charger |
| 460 | 10 | kEyLESS-GO system control unit |
| 461 | 5 | Antenna amplifier FM 1, AM and KEYLESS-GO system |
| 462 | 40 | Speaker amplifier control unit |
| 463 | 30 | A205, C205: Electrical connector for soft top/vehicle interior W205, S205, V205: Heated rear window (R1) via rear window interference suppression capacitor |
| 464 | 40 | Tailgate drive control unit Tailgate drive control unit |
| 465 | 40 | Rear SAM |
| 466 | 40 | Rear SAM |
| 467 | 40 |
|
In the engine compartment
There are two blocks responsible for protecting the electrical circuits of the car.
Power fuse links
The high power fuse box is located near the battery.
Photo - an example of execution.
| Diagram | ||
|---|---|---|
Type 1
|
||
Type 2
|
||
| No. | Description | Amps |
| C1 | Hybrid: Trip Relay | - |
| C2 | Hybrid: Terminal 31 | - |
| C3/1 | Signals from the ESP control unit | 40 |
| C3/2 | Signals from the ESP control unit | 60 |
| F32 3k1 |
Isolating relay | - |
| 1 | Not used | - |
| 2 | Diesel: Glow Plug Output Stage Module | 100 |
| 3 | Engine fuse and relay module | 60 |
| 4 | On-board battery connector | - |
| 5 | Engine fuse and relay box | 150 |
| 6 | Fuse and relay box, left | 125 |
| 7 | Fan motor | 80 |
| 8 | power steering | 125 |
| 9 | Cooling fan motor (1000W) | 150 |
| 10 | Power fuse block in the cabin | 200 |
| 11 | Not used | - |
| 12 | USA: Catalyst heater control unit Hybrid: Power electronics control unit |
- |
| 13 | Generator | 400 |
Fuse box
It is located on the left side of the engine compartment. For access, it is necessary to remove the lining and unscrew the fixing screws of the protective cover.
Photo is an example.
| Diagram | ||
|---|---|---|
|
||
| No. | Amps | Description |
| G | Terminal 15 relay, engine compartment | |
| H | Starter relay, terminal 50 | |
| I | Hybrid: Vacuum pump relay (+) | |
| J | CPC relay | |
| K | Reducer 722.9 (except 722.930): Oil pump relay | |
| L | Horn relay | |
| M | Wiper heater relay | |
| N | Relay terminal 87M | |
| O | Hybrid: Starter relay, terminal 15 | |
| P | Engine 274.9: Coolant pump relay | |
| Q | Hybrid: Vacuum pump relay (-) | |
| R | AIRMATIC system relay | |
| 100 | 40 | Hybrid: Vacuum pump |
| 101 | 15 | Not AMG: Cable termination terminal 87/2 |
| 20 | AMG: Cable termination terminal 87/2 | |
| 102 | 20 | Not AMG: Cable termination terminal 87/1 |
| 25 | AMG: Cable termination terminal 87/1 | |
| 103 | 15 | Not AMG: Cable termination terminal 87/4 |
| 20 | AMG: Cable termination terminal 87/4 | |
| 104 | 15 | Not AMG: Cable termination terminal 87/3 |
| 20 | AMG: Cable termination terminal 87/3 | |
| 105 | 15 | Reducer 722.9 (except 722.930): Control unit for auxiliary transmission oil pump |
| 106 | - | Not involved |
| 107 | 60 | Engine 274.9: Electric coolant pump |
| 108 | 20 |
|
| 109 | 30 | Wiper motor |
| 110 | 20 |
|
| 111 | 30 | Starter |
| 112 | 15 | Hybrid: Accelerator position sensor |
| 113 | - | Not involved |
| 114 | 40 | AIRMATIC compressor |
| 115 | 15 | Sound signal (horn) |
| 116 | - | Not involved |
| 117 | - | Not involved |
| 118 | 5 | Hybrid: Electronic Stability Program (ESP) control unit |
| 119 | 15 | Cable termination terminal 87 C2 |
| 120 | 5 | Not AMG: Cable termination terminal 87 C1 |
| 15 | AMG: Cable termination terminal 87 C1 | |
| 121 | 5 | electronic stabilization Program (ESP) control unit |
| 122 | 5 | CPC relay |
| 123 | - | Not involved |
| 124 | - | Not involved |
| 125 | 5 | Front SAM |
| 126 | 5 |
|
| 127 | 5 | Hybrid: Voltage drop limiter |
| 128 | 5 | Front left headlight and outdoor light switch |
| 129 | 30 | Hybrid: Starter relay (terminal 50) |
| 129A | 30 | |
