Mercedes-Benz S-Class A217 (2014-2018) – fuse box diagram
Year of production: 2014, 2015, 2016, 2017, 2018.
Lighter fuse (electrical outlet) on Mercedes S-Class A217 (2014-2018). Is a 430 and 460 fuse in the fuse box at the rear.
Fuse and relay box in the engine compartment
| No. | Description | Amps |
| 100 | Hybrid: vacuum pump | 40 |
| 101 | Connection sleeve, circuit 87/2 | 15 |
| 102 | Connection sleeve, circuit 87/2 | 20 |
| 103 | Connector, circuit 87M4 | 15 |
| 104 | Connector, circuit 87M3 | 15 |
| 105 | Valid for transmission 722.9: Control unit for auxiliary transmission oil pump | 15 |
| 106 | Windshield wiper parking heater | 25 |
| 107 | Applies to motors 277, 279: Electrical connection of starter motor / air pump | 60 |
| 108 | Valid for SAE LED dynamic headlights for right hand traffic or LED dynamic headlights :: front left lamp assembly right front lamp assembly valid without SAE Dynamic LED headlight for right side traffic or Dynamic LED headlight :: Right Front Lamp Assembly |
20 |
| 109 | Windshield wiper motor | 30 |
| 110 | Valid for SAE code LED dynamic headlights for right hand traffic or LED dynamic headlight :: Front left headlight Headlight Right Valid without SAE LED dynamic headlights for right-hand traffic or LED dynamic headlights :: Front left headlight |
20 |
| 111 | Starter | 30 |
| 112 | Motor fuse and relay module | 5 |
| 113 | Reservation | – |
| 114 | AIRmatic Compressor | 40 |
| 115 | Left-hand horn Right horn | 15 |
| 116 | Hybrid: vacuum pump relay | 5 |
| 117 | Reservation | – |
| 118 | Hybrid: electronic stability program control unit | 5 |
| 119 | 87 / C2 circuit connector bushing | 15 |
| 120 | 87 / C1 circuit connector bushing | 7,5 |
| 121 | Electronic Stability Program Control Unit | 5 |
| 122 | Hybrid: HYBRID Relay | 5 |
| 123 | Control unit Night Vision Assistant | 5 |
| 124 | Hybrid: Electrical connector for vehicle interior and engine compartment | 5 |
| 125 | SAM front control unit | 5 |
| 126 | Powertrain Control Unit Valid for diesel engine: CDI control unit Applies to gasoline engine: ME-SFI control unit [ME] |
5 |
| 127 | Reservation | – |
| 128 | External light switch | 5 |
| 129A | Hybrid: starter circuit 50 relay | 30 |
| 129B | Valid except for hybrids: 50 starter circuit relay | 30 |
| Relay | ||
| E | Relay 15 in engine compartment | |
| H | 50 start relay | |
| I | Brake vacuum pump relay | |
| J | Hybrid: HYBRID Relay | |
| K | Transmission oil pump relay | |
| L | Horn relay | |
| M | Windshield Wiper Parking Position Heater Relay | |
| N | 87 M relay circuit. | |
| O | Valid except for hybrids: Relay 15 of the starter circuit | |
| P | Secondary air injection relay | |
| Q | Hybrid: vacuum pump relay | |
| R | AIRmatic Relay | |
Instrument panel fuse panel
| No. | Description | Amps |
| 200 | SAM front control unit | 40 |
| 201 | SAM front control unit | 40 |
| 202 | Alarm siren | 5 |
| 203 | W222: Driver’s seat heating controller | 30 |
| 204 | Diagnostic connector | 5 |
| 205 | Electronic ignition interlock control unit | 7,5 |
| 206 | Analog clock | 5 |
| 207 | Climate control unit | 20 |
| 208 | Instrument cluster | 7,5 |
| 209 | Front air conditioning control panel | 5 |
| 210 | Control unit of the direction light module | 10 |
| 211 | Reservation | – |
| 212 | Reservation | – |
| 213 | Electronic stability program control unit | 25 |
| 214 | Reservation | – |
| 215 | Reservation | – |
| 216 | Reservation | – |
| 217 | Japanese version: Dedicated control unit for short range communications | 5 |
| 218 | Additional control unit for the restraint system | 5 |
| 219 | Control unit of the weight detection system (WSS) Front passenger seat occupancy recognition and ACSR |
5 |
| 220 | MAGIC VISION CONTROL | 15 |
| Relay | ||
| D | MAGIC VISION CONTROL | |
| E | Reserve courier | |
| F | Relay, circuit 15R | |
Fuse box in passenger leg room
- Circuit 30 “E1” connection
- Circuit 30g “E2” connection
| No. | Description | Amps |
| 301 | Mirror Taximeter | 5 |
| 302 | Right Front Door Controller | 30 |
| 303 | W222: Controller left rear door C217, A217: Controller rear |
30 |
| 304 | W222: Controller right rear door C217, A217: Rear controller |
30 |
| 305 | Driver’s seat control unit | 30 |
| 306 | Front passenger seat control unit | 30 |
| 307 | W222: Intelligent servo module for DIRECT SELECT | 30 |
| C217, A217: Driver’s seat heating controller | 30 | |
| 308 | Front passenger seat heating controller | 30 |
| 309 | Alarm call system control unit Telematic services communication module Control unit HERMES |
5 |
| 310 | Stationary heater control unit | 25 |
| 311 | Rear fan motor | 10 |
| 312 | Hanging control panel control unit | 10 |
| 313 | Hybrid and Hybrid Plus: power electronics control unit | 10 |
| 314 | A217: Anti-theft alarm system (designation in coordination) | 7,5 |
| 315 | Powertrain Control Unit Valid for gasoline engine: ME-SFI control unit Valid for motor 642, 651: CDI control unit |
10 |
| 316 | Reservation | – |
| 317 | W222: Control module for sliding panorama roof C217, A217: Controller MAGIC SKY CONTROL |
30 |
| 318 | Audio Screen / COMAND | 15 |
| 319 | Panoramic sliding roof control module C217, A217: Control module for the panoramic blind. |
30 |
| 320 | Active Body Control Unit AIRmatic (works except for Active Body Control) |
15 |
| 321 | C217, A217: Intelligent servo module for DIRECT SELECT | 20 |
| 322 | COMAND control unit | 15 |
| 323 | Control unit for additional restraint system | 7,5 |
| MF1 / 1 | Japanese version: Dedicated short range communications control unit | 7,5 |
| MF1 / 2 | Monochrome multifunction camera Multifunction camera stereo |
7,5 |
| MF1 / 3 | Rain/light sensor with additional functions Controller in the control panel |
7,5 |
| MF1 / 4 | Driver’s seat control unit | 7,5 |
| MF1 / 5 | Front passenger seat control unit | 7,5 |
| MF1 / 6 | Control unit of the direction light module | 7,5 |
| MF2 / 1 | Perfume atomizer generator | 5 |
| MF2 / 2 | Audio Control Panel / COMAND Touchpad |
5 |
| MF2 / 3 | Electronic stability program control unit | 5 |
| MF2 / 4 | Main Screen | 5 |
| MF2 / 5 | Hybrid and Hybrid Plus: Electric refrigerant compressor | 5 |
| MF2 / 6 | Reservation | – |
| MF3 / 1 | SAM front control unit | 5 |
| MF3 / 2 | Radar sensor control unit | 5 |
| MF3 / 3 | COMMAND the fan motor | 5 |
| MF3 / 4 | Button group on the driver’s side instrument panel Button group on the center instrument panel |
5 |
| MF3 / 5 | Rear air conditioning control unit | 5 |
| MF3 / 6 | as of 01.06.2016: Antenna switch for telephone and stationary heater | 5 |
Rear fuse and relay box
- Circuit 30 “E1” connection
- Circuit 30g “E2” connection
| No. | Description | Amps |
| 400 | Parking system control unit (active parking assistant or 360 degree camera) | 10 |
| 401 | Trunk lid controller | 5 |
| 402 | Rear entertainment controller | 7,5 |
| 403 | Reservation | – |
| 404 | Arm Heater Controller | 7,5 |
| 405 | Sound Control System Amplifier Device. Left front door control system tweeter Tweeter of the right front door control unit |
7,5 |
| 406 | Reservation | – |
| 407 | Reservation | – |
| 408 | Tuner Module | 5 |
| 409 | Camera control unit 360 inverting |
5 |
| 410 | Camera lid control unit | 5 |
| 411 | Control unit of the tire pressure monitor | 5 |
| 412 | Rear seat heating controller | 7,5 |
| 413 | Rear left display Right Rear Display |
10 |
| 414 | Rear cell phone antenna system amplifier/compensator Rear cell phone cradle back of cell phone contact plate Bluetooth Phone Module ® (SAP Profile) |
7,5 |
| 415 | Reservation | – |
| 416 | Reservation | – |
| 417 | Trailer recognition control unit | 20 |
| 418 | Reservation | – |
| 419 | Reservation | – |
| 420 | DC / AC converter control unit | 30 |
| 421 | Pneumatic multi-contour pump with seat | 30 |
| 422 | W222: Controller right rear door | 30 |
| 423 | Reservation | – |
| 424 | Rear SAM control unit | 40 |
| 425 | Reservation | – |
| 426 | Bass speaker amplifier | 30 |
| 427 | Arm Heater Controller | 20 |
| 428 | Trailer recognition control unit | 15 |
| 429 | Rear cup holder | 10 |
| 430 | Cigarette lighter with ashtray, rear Cigarette lighter with illumination 12V rear center console socket (ashtray pack / smoker’s pack) |
15 |
| 431 | Rear seat back cooler | 15 |
| 432 | Rear SAM control unit | 10 |
| 433 | AdBlue control unit ® | 25 |
| 434 | AdBlue control unit ® | 15 |
| 435 | AdBlue control unit ® | 20 |
| 436 | Rear cup holder | 20 |
| 437 | Reservation | – |
| 438 | C217 with 157 engine: Right exhaust flap drive motor | 7,5 |
| 439 | C217 with 157 engine: Left exhaust flap drive motor | 7,5 |
| 440 | Reservation | – |
| 441 | Reservation | – |
| 442 | Reservation | – |
| 443 | Reservation | – |
| 444 | Reservation | – |
| 445 | Stationary Radio Heater Remote Control Receiver | 5 |
| 446 | FM 1, AM, CL antenna amplifier [ZV] and KEYLESS-GO | 5 |
| 447 | Hybrid: battery management system control unit | 7,5 |
| 448 | Reservation | – |
| 449 | Reservation | – |
| 450 | Reservation | – |
| 451 | Trailer Socket | 15 |
| 452 | Rear left bumper radar sensor Right rear bumper center radar sensor rear bumper |
5 |
| 453 | Radar sensor front left bumper Radar sensor Front right bumper COLISION PREVENTION ASSISTANCE controller. |
5 |
| 454 | AdBlue control unit ® Unit fuel system control unit |
5 |
| 455 | Fully Integrated Transmission Control Controller | 15 |
| 456 | Reservation | – |
| 457 | Applies to the lithium-ion battery: Starting battery capacitor | 7,5 |
| 458 | Reservation | – |
| 459 | Reservation | – |
| 460 | Front cigarette lighter with ashtray lighting | 15 |
| 461 | 12 volt socket on the right rear center console 12-volt socket V of DC / AC converter of control unit |
15 |
| 462 | Trunk socket | 15 |
| 463 | Reservation | – |
| 464 | Trailer recognition control unit | 20 |
| 465 | Electric Parking Brake Controller | 30 |
| 466 | Front left door controller | 30 |
| 467 | KEYLESS-GO Control Unit | 10 |
| 468 | Electric Parking Brake Controller | 30 |
| 469 | Fuel system control unit | 25 |
| 470 | Left rear seat heating controller Heating controller Rear seat |
30 |
| 471 | Right Rear Seat Heating Controller | 30 |
| 472 | C217, A217: Rear control unit | 30 |
| 473 | Trailer recognition control unit | 20 |
| 475 | Sound system amplifier control unit | 40 |
| 476 | Sound system amplifier control unit | 40 |
| 477 | Active belt buckle control unit C217, A217: Rear control unit |
40 |
| 478 | Left rear seat controller | 30 |
| 479 | Active belt buckle control unit | 40 |
| 480 | Right Rear Seat Controller | 30 |
| 481 | Left front reversible emergency voltage retractor | 5 |
| 482 | W222: MAGIC SKY CONTROL Unit. | 5 |
| C217, A217: MAGIC SKY CONTROL Unit. | 7,5 | |
| 483 | Emergency voltage reversible right front retractor | 5 |
| 484 | Right Rear Seat Controller Left Rear Seat |
7,5 |
| 485 | Active belt buckle control unit | 5 |
| 486 | Hybrid: Battery management system control unit. power electronics control unit |
10 |
| 487 | Electric Parking Brake Controller | 5 |
| 488 | Rear SAM control unit | 5 |
| 489 | Front long range radar sensor | 5 |
| 490 | Pneumatic multicontour pump with seat | 5 |
| 491 | Trunk lid controller | 40 |
| 492 | Emergency voltage reversible right front retractor | 40 |
| 493 | Reservation | – |
| 494 | Rear SAM control unit | 40 |
| 495 | Rear Window Heater | 40 |
| 496 | Left front reversible emergency voltage retractor | 40 |
| Relay | ||
| S | Vehicle interior relay 15 | |
| T | Rear Window Heating Relay | |
| U | Second row beverage door and seat relay | |
| V | AdBlue courier ® | |
| W | Circuit 15R relay | |
| X | 1st row of seats / trunk cooler and plug relay | |
| Y | Reserve courier | |
Engine compartment pre-fuse box
Bottom view
Top view
1 – Connection, circuit 30 “B1
2 – Connection, circuit 30 not latched “B2”.
| No. | Description | Amps |
| M3 | Hybrid: electric machine | 500 |
| Valid except for hybrids: alternator | 500 | |
| M1 | Hybrid: electric machine | – |
| Valid except for Hybrid: Starter | – | |
| MR5 | Electric power steering control unit | 100 |
| MR2 | Fan Motor | 100 |
| M4 | Hybrid: w Fully integrated transmission control controller | 100 |
| I1 | Reservation | – |
| M2 | Applies to the diesel engine: brightness power stage | 150 |
| MR1 | Motor fuse and relay module | 60 |
| MR3 | Reservation | – |
| MR4 | Valid for 277, 279 engines: Fan motor | 150 |
| I2 | Reservation | – |
Starter box inside the vehicle
F32 / 4k2 – Standby current cut-off relay
| No. | Description | Amps |
| I7 | Fuse box on the right on the A-pillar. | 125 |
| I2 | Left fuse and relay module | 125 |
| C2 | Reservation | – |
| I8 | Reservation | – |
| I9 | Reservation | – |
| I3 | No-load cut-off relay connection | – |
| C1 | Fan controller | 40 |
| I1 | Electronic stability program control unit | 40 |
| I4 | Reservation | – |
| I6 | Rear fuse and relay module | 60 |
| I5 | The fuse box on the A-pillar on the right. | 60 |
Rear Prebox
F33k1 – Relay
Decoupling F33k2 – Additional battery relay with ECO start/stop function
| No. | Description | Amps |
| I3 | Reservation | – |
| I2 | Windshield heating control unit | 125 |
| I7 | Hybrid: high voltage disconnect device | 7,5 |
| I4 | Rear fuse and relay module | 150 |
| I6 | Additional battery with ECO start / stop function | 200 |
| I7 | ECO start/stop function secondary battery SAM front control unit Electronic ignition interlock control unit |
10 |
| I1 | Reservation | – |
| I11 | Reservation | – |
| I7 | SAM front control unit | 10 |
| I8 | ECO start / stop function additional battery relay connection | – |
| I5 | Hybrid: Pyrotechnic high voltage fuse driven by the control unit of the secondary containment system | – |
| I9 | Decoupling relay connection | – |
