Mercedes-Benz W222 is the sixth generation of the S-class series of the German brand Mercedes-Benz which was produced in 2013, 2014, 2015, 2016, 2017, 2018, 2019 and 2020 with the designation S300, S350, S400, S450, S500 Hybrid, S550, S560, S600, S650, S63, S65 AMG 4MATIC in C217 coupe and A217 convertible. During this time, the model has been restyled. A separate series of Mercedes w222 is also known under the Mercedes-Maybach brand as part of the revival of the Maybach brand. In this publication you will find a description of the fuses and relays Mercedes 222 with box diagrams and their locations. Select the cigarette lighter fuse.
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 electrical equipment, check the information with your diagrams.
Brochure example with designation
Contents
Passenger compartment
Box in the dashboard
A box with fuses and relays is installed in the left end of the dashboard behind a protective cover.
Diagram
Assignment
| 200 | 40A Front SAM control unit |
| 201 | 40A Front SAM control unit |
| 202 | 5A Alarm Siren |
| 203 | 30A W222: Driver seat heater control unit. |
| 204 | 5A Diagnostic connector |
| 205 | 7.5A Electronic ignition lock control unit |
| 206 | 5A Analog clock |
| 207 | 20A Climate control unit |
| 208 | 7.5A Instrument panel |
| 209 | 5A Front climate control unit |
| 210 | 10A Steering column tube module control unit |
| 211 | Spare |
| 212 | Spare |
| 213 | 25A Electronic stabilization system control unit |
| 214 | Spare |
| 215 | Spare |
| 216 | Spare |
| 217 | 5A Japanese version: special control unit for short range communication system |
| 218 | 5A Secondary restraint system control unit |
| 219 | 5A Weight measurement system (WSS) control unit |
| Front passenger seat occupied recognition and ACSR | |
| 220 | 15A MAGIC VISION CONTROL Relay |
| Relay | |
| D | MAGIC VISION CONTROL relay |
| E | Backup relay |
| F | Relay circuit 15R |
Fuse box under the panel
On the right pillar, under the instrument panel, there is a fuse box.
Photo example
Diagram
Designation
| 301 | 5A Mirror Taximeter |
| 302 | 30A Front right door control unit |
| 303 | 30A W222: Left rear door control unit. |
| C217, A217: Rear control box | |
| 304 | 30A W222: Rear right door control unit. |
| C217, A217: Rear control box | |
| 305 | 30A Driver’s seat control unit |
| 306 | 30A Front passenger seat control unit |
| 307 | 20A W222: Intelligent servo module for DIRECT SELECT |
| 30A C217, A217: Driver seat heater control unit. | |
| 308 | 30A Front passenger seat heater control unit |
| 309 | 5A Emergency call system control unit |
| Telematic services communication module | |
| HERMES control unit | |
| 310 | 25A Stationary heater control unit |
| 311 | 10A Rear fan motor |
| 312 | 10A Overhead control box |
| 313 | 10A Hybrid and Hybrid Plus: power electronics control unit |
| 314 | 7.5A A217: Anti-theft alarm (designation by agreement) |
| 315 | 10A Transmission control unit |
| Valid for petrol engine: ME-SFI control unit | |
| Valid for engines 642, 651: CDI control unit | |
| 316 | Spare |
| 317 | 30A W222: Panoramic sliding sunroof control unit. |
| C217, A217: MAGIC SKY CONTROL control unit | |
| 318 | 15A Audio/display COMAND |
| 319 | 30A Panoramic sliding sunroof control unit |
| C217, A217: Panoramic sunblind control module. | |
| 320 | 15A Active Body Control |
| AIRmatic control unit (valid except for Active Body Control) | |
| 321 | 20A C217, A217: Intelligent servo module for DIRECT SELECT |
| 322 | 15A COMAND control unit |
| 323 | 7.5A Secondary restraint system control unit |
| MF1 / 1 | 7.5A Japan version: special control unit for short range communication system |
| MF1 / 2 | 7.5A Monochrome multifunctional camera |
| Multifunctional stereo camera | |
| MF1 / 3 | 7.5A Rain/light sensor with additional functions |
| Overhead control panel control box | |
| MF1 / 4 | 7.5A Driver’s seat control unit |
| MF1 / 5 | 7.5A Front passenger seat control unit |
| MF1 / 6 | 7.5A Steering column tube module control unit |
| MF2 / 1 | 5A Perfume atomizer generator |
| MF2 / 2 | 5A Audio / COMAND control panel |
| 5A Touch panel | |
| MF2 / 3 | 5A Control unit for electronic stabilization system |
| MF2 / 4 | 5A Head-up display |
| MF2 / 5 | 5A Hybrid and Hybrid Plus: electric refrigerant compressor |
| MF2 / 6 | Spare |
| MF3 / 1 | 5A Front SAM control unit |
| MF3 / 2 | 5A Radar sensors control unit |
| MF3 / 3 | 5A Fan motor COMAND |
| MF3 / 4 | 5A Group of buttons on the instrument panel on the driver’s side |
| Group of buttons on the central instrument panel | |
| MF3 / 5 | 5A Rear air conditioner control unit |
| MF3 / 6 | 5A from 06/01/2016: Antenna switch for telephone and stationary heater |
Power fuse box
It is also installed under the panel, under the interior trim, at the feet of the front passenger.
Photo
Diagram
Allocation
| I7 | 125A Fuse box in the right A-pillar |
| I2 | 125A Left fuse and relay module |
| C2 | Spare |
| I8 | Spare |
| I9 | Spare |
| I3 | Connection of the relay of shutdown of current of idling |
| C1 | 40A Blower regulator |
| I1 | 40A Electronic stabilization system control unit |
| I4 | Spare |
| I6 | 60A Rear fuse and relay module |
| I5 | 60A Fuse box in the right A-pillar |
| F32 / 4k2 | Relay for quiescent current interruption |
Luggage compartment
Fuse and relay box
In the luggage compartment on the right side is the main fuse and relay box.
Diagram
Appointment
- Connection circuit 30 “E1”
- Circuit connection 30g “E2”
| 400 | 10A Parking control module (Active Parking Assist or 360 code camera) |
| 401 | 5A Trunk lid control unit |
| 402 | 7.5A Rear entertainment control unit |
| 403 | Spare |
| 404 | 7.5A Armrest heater control unit |
| 405 | 7.5A Sound system amplifier control unit |
| Front left door tweeter control unit | |
| Front right door tweeter control unit | |
| 406 | Spare |
| 407 | Spare |
| 408 | 5A Tuner box |
| 409 | 5A 360° camera control unit |
| Rear View Camera | |
| 410 | 5A Camera cover control unit |
| 411 | 5A Tire pressure sensor control unit |
| 412 | 7.5A Rear seat heater control unit |
| 413 | 10A Left rear display |
| Right rear display | |
| 414 | 7.5A Rear cell phone antenna booster/compensator |
| Cell phone stand on the back | |
| Rear mobile phone contact plate | |
| Bluetooth telephone module (SAP profile) | |
| 415 | Spare |
| 416 | Spare |
| 417 | 20A Trailer recognition control unit |
| 418 | Spare |
| 419 | Spare |
| 420 | 30A DC/AC converter control unit |
| 421 | 30A Pneumatic pump with multi-contour seat |
| 422 | 30A W222: Rear right door control unit. |
| 423 | Spare |
| 424 | 40A Rear control unit SAM |
| 425 | Spare |
| 426 | 30A Bass speaker amplifier |
| 427 | 20A Armrest heater control unit |
| 428 | 15A Trailer recognition control unit |
| 429 | 10A Rear cup holder |
| 430 | Cigarette lighter with ashtray light, rear |
| 15A Illuminated cigarette lighter rear center console | |
| Socket on the center console left, rear, 12V (ashtray bag / smoker bag) | |
| 431 | 15A Refrigerator in the back |
| 432 | 10A Rear control unit SAM |
| 433 | 25A AdBlue control unit |
| 434 | 15A AdBlue control unit |
| 435 | 20A AdBlue control unit |
| 436 | 20A Rear cup holder |
| 437 | Spare |
| 438 | 7.5A C217 with engine 157: Right exhaust flap motor. |
| 439 | 7.5A C217 with engine 157: Left exhaust flap motor. |
| 440 | Spare |
| 441 | Spare |
| 442 | Spare |
| 443 | Spare |
| 444 | Spare |
| 445 | 5A Stationary heater radio control receiver |
| 446 | 5A Antenna amplifier FM 1, AM, CL [ZV] and KEYLESS-GO |
| 447 | 7.5A Hybrid: Battery Management System Control Unit |
| 448 | Spare |
| 449 | Spare |
| 450 | Spare |
| 451 | 15A Trailer socket |
| 452 | 5A Rear bumper radar sensor, left |
| Rear bumper radar sensor, right | |
| Rear Bumper Central Radar Sensor | |
| 453 | 5A Front bumper radar sensor, left |
| Radar sensor front bumper right | |
| COLLISION PREVENTION ASSIST control unit | |
| 454 | 5A AdBlue control unit |
| Fuel system control unit | |
| 455 | 15A Fully integrated transmission control unit |
| 456 | Spare |
| 457 | 7.5A Valid for lithium-ion battery: starter battery capacitor |
| 458 | Spare |
| 459 | Spare |
| 460 | 15A Front cigarette lighter with ashtray light |
| 461 | 15A Right rear center console socket 12V |
| Socket 12V | |
| AC/DC converter control unit | |
| 462 | 15A Socket for luggage compartment |
| 463 | Spare |
| 464 | 20A Trailer recognition control unit |
| 465 | 30A Electric parking brake control unit |
| 466 | 30A Front left door control unit |
| 467 | 10A KEYLESS-GO control box |
| 468 | 30A Electric parking brake control unit |
| 469 | 25A Fuel system control unit |
| 470 | 30A Rear left seat heater control unit |
| Rear seat heater control unit | |
| 471 | 30A Rear right seat heater control unit |
| 472 | 30A C217, A217: Rear control box |
| 473 | 20A Trailer recognition control unit |
| 475 | 40A Sound system amplifier control unit |
| 476 | 40A Sound system amplifier control unit |
| 477 | 40A Active belt buckle control unit |
| C217, A217: Rear control box | |
| 478 | 30A Left rear seat control unit |
| 479 | 40A Active belt buckle control unit |
| 480 | 30A Right rear seat control unit |
| 481 | 5A Reversible Front Left Emergency Tension Retractor |
| 482 | 5A W222: MAGIC SKY CONTROL control unit |
| 7.5A C217, A217: MAGIC SKY CONTROL control unit | |
| 483 | 5A Reversible emergency tensioner retractor front right |
| 484 | 7.5A Right rear seat control unit |
| Left rear seat control unit | |
| 485 | 5A Active belt buckle control unit |
| 486 | 10A Hybrid: |
| Battery management system control unit | |
| Power electronics control unit | |
| 487 | 5A Electric parking brake control unit |
| 488 | 5A Rear control unit SAM |
| 489 | 5A Front long range radar sensor |
| 490 | 5A Pneumatic pump with multi-contour seat |
| 491 | 40A Trunk lid control unit |
| 492 | 40A Emergency Tension Reversible Retractor Front Right |
| 493 | Spare |
| 494 | 40A Rear control unit SAM |
| 495 | 40A Heated rear window |
| 496 | 40A Reversible Front Left Emergency Tension Retractor |
| Relay | |
| S | Relay circuit 15 car interior |
| Т | Rear defroster relay |
| U | 2nd row of seats cup holder and relay sockets |
| V | Adblue relay |
| W | Circuit relay 15R |
| X | Relay for refrigerator and sockets of the 1st row of seats / trunk |
| Y | Spare relay |
Fuses numbered 430, 460 and 461 are responsible for the operation of the cigarette lighters.
Power fuse box
Another power fuse box is installed on the back of the rear seat, next to the amplifier.
Diagram
Decoding
| I3 | Spare |
| I2 | 125A Windshield heater control unit |
| I7 | 7.5A Hybrid: high voltage disconnect device |
| I4 | 150A Rear fuse and relay module |
| I6 | 200A Extra battery ECO start/stop |
| I7 | 10A Extra battery ECO start/stop |
| Front SAM control unit | |
| Electronic ignition lock control unit | |
| I1 | Spare |
| I11 | Spare |
| I7 | 10A Front SAM control unit |
| I8 | ECO start / stop function connection of additional battery relay |
| I5 | Hybrid: high voltage pyroelectric fuse triggered by the secondary restraint system control unit |
| I9 | Connecting the decoupling relay |
| F33k1 | Decoupling relay |
| F33k2 | ECO start/stop function optional battery relay |
Some additional protection elements can also be attached to the battery terminals.
Boxes under the hood
Under the hood of the Mercedes w222, there are 2 fuse boxes (left and right). To access, remove the protective cover.
Fuse and relay box
Located on the left side of the engine compartment.
Diagram
Assignment
| 100 | 40A Hybrid: vacuum pump |
| 101 | 15A Coupling, circuit 87/2 |
| 102 | 20A Coupling, circuit 87/2 |
| 103 | 15A Chain coupler 87M4 |
| 104 | 15A Chain coupler 87M3 |
| 105 | 15A For gearbox 722.9: Auxiliary transmission oil pump control unit |
| 106 | 25A Wiper park position heater |
| 107 | 60A Valid for engines 277, 279: Electrical connection for starter/air pump |
| 108 | 20A Valid for SAE dynamic LED headlight for right-hand traffic or dynamic LED headlight: |
| Front left lamp unit | |
| Front right lamp unit | |
| Valid without SAE Dynamic LED Headlight for Right Hand Traffic or Dynamic LED Headlight: | |
| Front right lamp unit | |
| 109 | 30A Wiper Motor |
| 110 | 20A Valid for dynamic LED headlight with SAE code for right-hand traffic or dynamic LED headlight: |
| Front left lamp unit | |
| Front right lamp unit | |
| Valid without SAE Dynamic LED Headlight for Right Hand Traffic or Dynamic LED Headlight: | |
| Front left lamp unit | |
| 111 | 30A Starter |
| 112 | 5A Engine fuse and relay module |
| 113 | Spare |
| 114 | 40A AIRmatic compressor |
| 115 | 15A Left Horn Fanfare |
| Right fanfare horn | |
| 116 | 5A Hybrid: vacuum pump relay |
| 117 | Spare |
| 118 | 5A Hybrid: electronic stabilization control unit |
| 119 | 15A Chain coupler 87 / C2 |
| 120 | 7.5A Chain coupler 87 / C1 |
| 121 | 5A Control unit for electronic stabilization system |
| 122 | 5A Hybrid: HYBRID relay |
| 123 | 5A Night View Assist control unit |
| 124 | 5A Hybrid: car interior and engine compartment electrical connector |
| 125 | 5A Front SAM control unit |
| 126 | 5A Transmission control unit |
| Valid for diesel engine: CDI control unit | |
| Valid for petrol engine: Control unit ME-SFI [ME] | |
| 127 | Spare |
| 128 | 5A Outdoor light switch |
| 129A | 30A Hybrid: Starter Circuit Relay 50 |
| 129B | 30A Valid except hybrid: starter circuit relay 50 |
| Relay | |
| G | Circuit 15 relay in engine compartment |
| H | Starter circuit relay 50 |
| I | Brake vacuum pump relay |
| J | Hybrid: HYBRID relay |
| K | Transmission oil pump relay |
| L | Horn relay |
| M | Wiper park position heater relay |
| N | Circuit relay 87M |
| О | Valid except hybrid: starter circuit 15 relay |
| P | Secondary air injection relay |
| Q | Hybrid: vacuum pump relay |
| R | AIRmatic relay |
Power fuse box
Installed on the right side of the engine compartment.
Diagram
Designation
- Connection, circuit 30 “B1”
- Connection, circuit 30 momentary “B2”
| M3 | 500A Hybrid: electric machine |
| 500A Valid except Hybrid: Alternator | |
| M1 | Hybrid: electric car |
| Valid except Hybrid: Starter | |
| MR5 | 100A Electric power steering control unit |
| MR2 | 100A fan motor |
| M4 | 100A Hybrid: fully integrated transmission control unit |
| I1 | Spare |
| M2 | 150A Valid for diesel engine: Glow output stage |
| MR1 | 60A Engine fuse and relay module |
| MR3 | Spare |
| MR4 | 150A Valid for motors 277, 279: Fan motor |
| I2 | Spare |
That’s all. And if you have something to add – write in the comments.