Table of Contents
The Mercedes-Benz S-Class debuted in May 2013. During interior development, the long-wheelbase version served as the foundation to maximize rear-passenger comfort. In 2017, the model underwent a mid-cycle facelift. In this article, we take a detailed look at the fuse box diagrams for the Mercedes-Benz S-Class (chassis codes W222 / C217 / A217; S300, S350, S400, S450, S500, S550, S560, S600, S650, S63 AMG, and S65 AMG) covering model years 2013 through 2020.
Below you will find fuse box locations, photos, and circuit assignment diagrams. Fuses for the “cigarette lighter” and 12 V power sockets are highlighted in bold.
Luggage Compartment Fuse Box
The fuse panel is located on the right side of the trunk, behind the side trim panel.
| Diagram | ||
|---|---|---|
|
||
| No. | Rating (A) | Description |
| S | - | Circuit 15 relay |
| T | - | Heated rear window relay |
| U | - | Rear cup holder and power outlet relay |
| V | - | AdBlue® relay |
| W | - | Circuit 15R relay |
| X | - | Refrigerator and front-row power outlets relay |
| Y | - | Reserve |
| 1 | - | Circuit 30 connection “E1” |
| 2 | - | Circuit 30g connection “E2” |
| 400 | 10 | Active Parking Assist / 360° camera control unit |
| 401 | 5 | Trunk lid control unit |
| 402 | 7.5 | Rear seat entertainment control unit |
| 403 | - | Reserve |
| 404 | 7.5 | Armrest heating control unit |
| 405 | 7.5 | Sound system amplifier / Front left door tweeter / Front right door tweeter control unit |
| 406 | - | Reserve |
| 407 | - | Reserve |
| 408 | 5 | TV / Radio tuner |
| 409 | 5 | 360° camera control unit |
| Rearview camera | ||
| 410 | 5 | Rearview camera cover control unit |
| 411 | 5 | Tire pressure monitoring system (TPMS) control unit |
| 412 | 7.5 | Heated rear seats control unit |
| 413 | 10 | Rear left display |
| Rear right display | ||
| 414 | 7.5 | Rear cellular antenna amplifier / compensator |
| Rear mobile phone cradle / contact plate | ||
| Bluetooth® telephone module (SAP profile) | ||
| 415 | - | Reserve |
| 416 | - | Reserve |
| 417 | 20 | Trailer recognition control unit |
| 418 | - | Reserve |
| 419 | - | Reserve |
| 420 | 30 | AC/DC inverter control unit |
| 421 | 30 | Multi-contour seat pneumatic pump |
| 422 | 30 | W222: Rear right door control unit |
| 423 | - | Reserve |
| 424 | 40 | Rear Signal Acquisition and Actuation Module (SAM) |
| 425 | - | Reserve |
| 426 | 30 | Subwoofer amplifier |
| 427 | 20 | Armrest heating control unit |
| 428 | 15 | Trailer recognition control unit |
| 429 | 10 | Heated/cooled rear cup holders |
| 430 | 15 | Mercedes-Benz W222 rear cigarette lighter fuse |
| 12 V socket (rear left center console) | ||
| 431 | 15 | Rear seat center refrigerator |
| 432 | 10 | Rear SAM control unit |
| 433 | 25 | AdBlue® control unit |
| 434 | 15 | |
| 435 | 20 | |
| 436 | 20 | Rear cup holder |
| 437 | - | Reserve |
| 438 | 7.5 | C217 (M157 engine): Right exhaust flap actuator |
| 439 | 7.5 | C217 (M157 engine): Left exhaust flap actuator |
| 440 | - | Reserve |
| 441 | - | |
| 442 | - | |
| 443 | - | |
| 444 | - | |
| 445 | 5 | Auxiliary heater radio remote control receiver |
| 446 | 5 | FM1, AM, central locking (CL), and KEYLESS-GO antenna amplifier |
| 447 | 7.5 | Hybrid models: Battery management system (BMS) control unit |
| 448 | - | Reserve |
| 449 | - | |
| 450 | - | |
| 451 | 15 | Trailer socket |
| 452 | 5 | Rear left bumper radar sensor |
| Rear right bumper radar sensor | ||
| Rear center bumper radar sensor | ||
| 453 | 5 | Front left bumper radar sensor |
|
||
| 454 | 5 |
|
| 455 | 15 | Fully Integrated Transmission Control (VGS) unit |
| 456 | - | Reserve |
| 457 | 7.5 | Lithium-ion battery models: Starter battery capacitor |
| 458 | - | Reserve |
| 459 | - | Reserve |
| 460 | 15 | Front cigarette lighter fuse / 12 V socket |
| 461 | 15 | 12 V socket (rear right center console) / AC/DC inverter control unit |
| 462 | 12 V power outlet in trunk | |
| 463 | Reserve | |
| 464 | 20 | Trailer recognition control unit |
| 465 | 30 | Electric parking brake control unit |
| 466 | 30 | Front left door control unit |
| 467 | 10 | KEYLESS-GO control unit |
| 468 | 30 | Electric parking brake control unit |
| 469 | 25 | Fuel pump / fuel system control unit |
| 470 | 30 | Rear left seat heating control unit |
| Rear seat heating control unit | ||
| 471 | 30 | Rear right seat heating control unit |
| 472 | 30 | C217, A217: Rear control unit |
| 473 | 20 | Trailer recognition control unit |
| 475 | 40 | Sound system amplifier control unit |
| 476 | 40 | |
| 477 | 40 | Active belt buckle control unit |
| C217, A217: Rear control unit | ||
| 478 | 30 | Rear left seat control unit |
| 479 | 40 | Active belt buckle control unit |
| 480 | 30 | Rear right seat control unit |
| 481 | 5 | Reversible emergency tensioning retractor (front left) |
| 482 | 5 | W222: MAGIC SKY CONTROL® control unit |
| 482 | 7.5 | C217, A217: MAGIC SKY CONTROL® control unit |
| 483 | 5 | Reversible emergency tensioning retractor (front right) |
| 484 | 7.5 | Rear right seat control unit |
| Rear left seat control unit | ||
| 485 | 5 | Active belt buckle control unit |
| 486 | 10 | Hybrid models: Battery management system (BMS) control unit, power electronics control unit |
| 487 | 5 | Electric parking brake control unit |
| 488 | 5 | Rear SAM control unit |
| 489 | 5 | Front long-range radar sensor |
| 490 | 5 | Multi-contour seat pneumatic pump |
| 491 | 40 | Trunk lid control unit |
| 492 | 40 | Reversible emergency tensioning retractor (front right) |
| 493 | - | Reserve |
| 494 | 40 | Rear SAM control unit |
| 495 | 40 | Heated rear window |
| 496 | 40 | Reversible emergency tensioning retractor (front left) |
Passenger Compartment Fuse Boxes
The cabin contains two fuse boxes that protect various interior electrical circuits.
Main Passenger Compartment Fuse Box
The main fuse box is located in the front passenger footwell.
General view of the Mercedes-Benz W222 / C217 interior fuse box.
| Diagram | ||
|---|---|---|
|
||
| No. | Rating (A) | Description |
| 1 | Circuit 30 connection “E1” | |
| 2 | Circuit 30g connection “E2” | |
| 301 | 5 | Taximeter mirror / Taxi mirror adapter |
| 302 | 30 | Front right door control unit |
| 303 | 30 | W222: Rear left door control unit |
| C217, A217: Rear control unit | ||
| 304 | 30 | W222: Rear right door control unit |
| C217, A217: Rear control unit | ||
| 305 | 30 | Driver seat control unit |
| 306 | 30 | Front passenger seat control unit |
| 307 | 20 | W222: DIRECT SELECT intelligent servo module |
| 307 | 30 | C217, A217: Driver seat heating control unit |
| 308 | 30 | Front passenger seat heating control unit |
| 309 | 5 | Emergency call (eCall) control unit |
| Telematics services communication module | ||
| HERMES module | ||
| 310 | 25 | Auxiliary heater control unit |
| 311 | 10 | Rear blower motor |
| 312 | 10 | Overhead control panel control unit |
| 313 | 10 | Hybrid and Plug-in Hybrid: Power electronics control unit |
| 314 | 7.5 | A217: Anti-theft alarm system (ATA) |
| 315 | 10 | Transmission control unit |
| Gasoline engines: ME-SFI motor electronics control unit | ||
| OM642, OM651 diesel engines: CDI control unit | ||
| 316 | - | Reserve |
| 317 | 30 | W222: Panoramic sliding sunroof control unit |
| C217, A217: MAGIC SKY CONTROL® control unit | ||
| 318 | 15 | COMAND® audio / display unit |
| 319 | 30 | Panoramic sliding sunroof control unit |
| C217, A217: Panoramic sunroof control unit | ||
| 320 | 15 | AIRmatic / Active Body Control (ABC) control unit |
| 321 | 20 | C217, A217: DIRECT SELECT intelligent servo module |
| 322 | 15 | COMAND® head unit |
| 323 | 7.5 | Supplemental Restraint System (SRS) control unit |
| MF1 / 1 | 7.5 | Japan models: DSRC / Short-range communication control unit |
| MF1 / 2 | 7.5 | Mono multipurpose camera |
| Stereo multipurpose camera | ||
| MF1 / 3 | 7.5 | Rain/light sensor with additional functions |
| Overhead control panel control unit | ||
| MF1 / 4 | 7.5 | Driver seat control unit |
| MF1 / 5 | 7.5 | Front passenger seat control unit |
| MF1 / 6 | 7.5 | Steering column module control unit |
| MF2 / 1 | 5 | Fragrance / perfume atomizer generator |
| MF2 / 2 | 5 | COMAND® audio control panel |
| Touchpad | ||
| MF2 / 3 | 5 | Electronic Stability Program (ESP®) control unit |
| MF2 / 4 | 5 | Head-up display (HUD) |
| MF2 / 5 | 5 | Hybrid and Plug-in Hybrid: Electric A/C compressor |
| MF2 / 6 | - | Reserve |
| MF3 / 1 | 5 | Front SAM control unit |
| MF3 / 2 | 5 | Radar sensor control unit |
| MF3 / 3 | 5 | COMAND® cooling fan motor |
| MF3 / 4 | 5 | Driver-side instrument panel switch group |
| Center console switch group | ||
| MF3 / 5 | 5 | Rear climate control unit |
| MF3 / 6 | 5 | From June 1, 2016: Telephone and auxiliary heater antenna switch |
Auxiliary Fuse Box
Located on the driver's side end of the dashboard panel.
| Diagram | ||
|---|---|---|
|
||
| No. | Rating (A) | Description |
| D | - | MAGIC VISION CONTROL® relay |
| E | - | Reserve |
| F | - | Circuit 15R relay |
| 200 | 40 | Front SAM control unit |
| 201 | 40 | |
| 202 | 5 | Anti-theft alarm siren |
| 203 | 30 | W222: Driver seat heating control unit |
| 204 | 5 | Diagnostic connector (OBD-II) |
| 205 | 7.5 | Electronic ignition switch (EIS/EZS) control unit |
| 206 | 5 | Analog clock |
| 207 | 20 | Automatic climate control |
| 208 | 7.5 | Instrument cluster |
| 209 | 5 | Front climate control panel |
| 210 | 10 | Steering column module control unit |
| 211 | - | Reserve |
| 212 | - | |
| 213 | 25 | Electronic Stability Program (ESP®) control unit |
| 214 | - | Reserve |
| 215 | - | |
| 216 | - | |
| 217 | 5 | Japan models: DSRC / Short-range communication control unit |
| 218 | 5 | Supplemental Restraint System (SRS) control unit |
| 219 | 5 | Weight Sensing System (WSS) |
| Front passenger seat occupancy recognition & Automatic Child Seat Recognition (ACSR) | ||
Engine Compartment Fuse Boxes
The engine compartment contains two fuse boxes that protect high-current and system electrical circuits.
Engine Compartment Fuse Box
The engine fuse box is located on the left side of the engine compartment. To access it, remove the trim covers, unclip the wiring harness, and detach the protective cover panel.
General view.
| Diagram | ||
|---|---|---|
|
||
| No. | Relay Modules | |
| H | Engine compartment Circuit 15 relay | |
| G | Starter Circuit 50 relay | |
| I | Vacuum brake pump relay | |
| J | Hybrid models: Hybrid system relay | |
| K | Electric transmission oil pump relay | |
| L | Horn relay | |
| M | Wiper park position heater relay | |
| N | Circuit 87M relay | |
| O | Non-hybrid models: Starter Circuit 15 relay | |
| P | Secondary air injection pump relay | |
| Q | Hybrid models: Vacuum pump relay | |
| R | AIRmatic compressor relay | |
| No. | Fuse Assignment | Rating (A) |
| 100 | Hybrid models: Vacuum pump | 40 |
| 101 | Circuit 87/2 connector | 15 |
| 102 | Circuit 87/2 connector | 20 |
| 103 | Circuit 87M4 connector | 15 |
| 104 | Circuit 87M3 connector | 15 |
| 105 | 7G-TRONIC (722.9 transmission): Auxiliary transmission oil pump control unit | 15 |
| 106 | Wiper park position heater | 25 |
| 107 | M277, M279 engines: Starter / secondary air pump electrical connection | 60 |
| 108 | Models with dynamic LED headlamps (SAE RHD or standard dynamic LED): Front left headlamp, front right headlamp | 20 |
| Models without dynamic LED headlamps: Front right headlamp | ||
| 109 | Windshield wiper motor | 30 |
| 110 | Models without dynamic LED headlamps (SAE RHD): Front left headlamp, front right headlamp | 20 |
| Models without dynamic LED headlamps: Front left headlamp | ||
| 111 | Starter motor | 30 |
| 112 | Engine fuse and relay module | 5 |
| 113 | Reserve | - |
| 114 | AIRmatic compressor | 40 |
| 115 | Left horn | 15 |
| Right horn | ||
| 116 | Hybrid models: Vacuum pump relay | 5 |
| 117 | Reserve | - |
| 118 | Hybrid models: Electronic Stability Program (ESP®) control unit | 5 |
| 119 | Circuit 87/C2 connector | 15 |
| 120 | Circuit 87/C1 connector | 7.5 |
| 121 | Electronic Stability Program (ESP®) control unit | 5 |
| 122 | Hybrid models: Hybrid system relay | 5 |
| 123 | Night View Assist control unit | 5 |
| 124 | Hybrid models: Cabin / engine compartment electrical connector | 5 |
| 125 | Front SAM control unit | 5 |
| 126 | Transmission control unit | 5 |
| Diesel models: CDI control unit | ||
| Gasoline models: ME-SFI motor electronics control unit | ||
| 127 | Reserve | - |
| 128 | Exterior light switch | 5 |
| 129A | Hybrid models: Starter Circuit 50 relay | 30 |
| 129B | Non-hybrid models: Starter Circuit 50 relay | 30 |
Main Power Pre-Fuse Box
The primary pre-fuse box, containing high-current fusible links, is located on the right side of the engine compartment.
General view.
| Diagram | ||
|---|---|---|
|
||
| No. | Rating (A) | Description |
| 1 | Circuit 30 connection “B1” | |
| 2 | Switched Circuit 30 connection “B2” | |
| M3 | 500 | Hybrid models: Electric motor |
| M3 | 500 | Non-hybrid / Mild Hybrid models: Alternator |
| M1 | - | Hybrid models: Electric motor |
| M1 | - | Non-hybrid models: Starter motor |
| MR5 | 100 | Electric power steering (EPS) control unit |
| MR2 | 100 | Radiator fan motor |
| M4 | 100 | Hybrid models: Fully Integrated Transmission Control (VGS) unit |
| I1 | - | Reserve |
| M2 | 150 | Diesel models: Glow plug output stage |
| MR1 | 60 | Engine compartment fuse and relay module |
| MR3 | - | Reserve |
| MR4 | 150 | M277, M279 engines: Radiator fan motor |
| I2 | - | Reserve |