2023 Mercedes S-CLASS Electrical Fuses User Manual
This tutorial covers the 2023 Mercedes S-Class fuses and fuse box, including its locations, functioning, and replacement. Maintaining your vehicle’s electrical systems requires understanding these components.
2023 Mercedes Benz S-Class Specs, Price, Features, Mileage (Brochure)
Video: 2023 Mercedes S-CLASS Fuses
Electrical Fuses
Notes on Car Electrical System
WARNING
Risk of accident and injury due to overloaded lines If you manipulate or bridge a faulty fuse or if you replace it with a fuse with a higher amperage, the electric line could be overloaded. This could result in a fire.
- Always replace faulty fuses with specified new fuses containing the correct amperage.
NOTE
Damage due to incorrect fuses Using incorrect fuses can result in damage to electrical components or systems or their functions being considerably restricted.
- Use only fuses approved for Mercedes-Benz with the respective specified fuse rating. Blown fuses must be replaced with fuses of the same rating, which you can recognize by the color and fuse rating. The fuse ratings and further information to be observed can be found on the fuse assignment diagram. Fuse assignment diagram: in the vehicle document wallet.
NOTE
Damage or malfunctions caused by moisture Moisture may cause damage to the electrical system or cause it to malfunction.
- When the Mercedes fuse box is open, make sure that no moisture can enter the fuse box.
- When closing the fuse box, make sure that the seal of the lid is positioned correctly on the fuse box.
If the newly inserted fuse also blows, have the cause traced and rectified at a qualified specialist workshop.
Ensure the following before replacing a fuse:
- The vehicle is secured against rolling away.
- All electrical consumers are switched off.
- The vehicle is switched off.
The electrical fuses are located in the following fuse boxes: - Fuse box on the driver’s side of the engine compartment
- Fuse box on the driver’s side of the cockpit
- Fuse box in the front passenger footwell
- Fuse box in the trunk on the right-hand side of the vehicle, when viewed in the direction of travel
Engine Compartment Fuse Box
Opening and closing the fuse box in the engine compartment
Opening and closing the fuse box in the engine compartment Requirements:
- Observe the notes on electrical fuses
- Have the following tools readily available: Opening
- Depending on the vehicle equipment, access to the fuse box may be limited. Mercedes-Benz recommends consulting a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center.
WARNING
Risk of injury from using the windshield wipers when the hood is open. If the windshield wipers start moving when the hood is open, you could be trapped by the wiper linkage.
- Always switch off the windshield wipers and vehicle before opening the hood.
- Release the rotary catches on cover 1 and pull the cover-up and out.
- Remove any existing moisture from the fuse box using a dry cloth.
- Depending on the vehicle equipment, there may be an electrical component 2 on the fuse box lid. If present, unscrew screw 3 and put the component to the side without disconnecting the electrical connection.
- If present, release hose 4 from the retaining clips on the fuse box and vehicle body.
- If present, release hose 5 from the retaining clips in the engine compartment and vehicle body.
- Unscrew screws 6 and fold out bar 7.
- Unscrew screws 8 and remove fuse box lid 9 to the side.
Closing
- Check whether the seal is positioned correctly in lid 9.
- Place lid 9 on the fuse box and tighten screws 8.
- Fold back bar 7 and tighten screws 6.
- If present, engage hoses 5 in the retaining clips in the engine compartment and vehicle body. the holder on the fuse box lid and tighten screws
- Insert cover 1 and engage the rotary catches
Fuse Box Diagram
| Type | No. | Description |
|---|---|---|
| Fuse ATO15A | 100 | Engine/transmission/HV battery cooling |
| Fuse ATO25A | 100 | Engine/transmission/HV battery cooling [AMG] |
| Fuse ATO7.5A | 101 | Engine electronics [12-cyl. petrol], [4/6-cyl. petrol], [8-cyl. petrol] |
| Fuse ATO15A | 101 | Engine electronics [6-cyl. diesel] |
| Fuse ATO20A | 102 | Engine electronics [12-cyl. petrol], [4/6-cyl. petrol] |
| Fuse ATO25A | 102 | Engine electronics [6-cyl. diesel], [8-cyl. petrol] |
| Fuse ATO20A | 103 | Engine electronics [12-cyl. petrol], [8-cyl. petrol], Secondary air injection pump |
| Fuse ATO15A | 103 | Engine electronics [4/6-cyl. petrol], [6-cyl. diesel], Secondary air injection pump |
| Fuse ATO25A | 103 | Engine electronics [48V 6-cyl. diesel], Secondary air injection pump |
| Fuse ATO20A | 104 | Engine electronics [12-cyl. petrol], [8-cyl. petrol] |
| Fuse ATO15A | 104 | Engine electronics [4/6-cyl. petrol], [6-cyl. diesel] |
| Fuse ATO15A | 105 | Engine electronics [12-cyl. petrol], [4/6-cyl. petrol], [6-cyl. diesel] |
| Fuse ATO20A | 105 | Engine electronics [8-cyl. petrol] |
| Fuse ATO25A | 107 | Lamps – front |
| Fuse ATO30A | 108 | Windscreen wipers |
| Fuse ATO7.5A | 109 | A/C system / heater, Inductive charging (high-voltage) |
| Fuse ATO10A | 110 | A/C system / heater |
| Fuse ATO30A | 111 | Central control unit – front |
| Fuse ATO30A | 112 | Windshield wiper recess heater |
| Fuse ATO25A | 113 | Lamps – front |
| Fuse ATO30A | 114 | Central control unit – front |
| Fuse ATO5A | 115 | ABS / ASR / ESP / BAS / Electrical parking brake, Gimbal reading lamp |
| Fuse ATO20A | 116 | Additional fuses for special-purpose vehicle |
| Fuse ATO30A | 117 | Starter motor 12 V |
| Fuse ATO40A | 117 | Starter motor 12 V [6 Cyl. Hybrid] |
| Fuse ATO7.5A | 118 | Engine electronics, Engine/transmission/HV battery cooling, Haptic accelerator pedal module |
| Fuse ATO10A | 119 | Electrical exhaust flap, Engine electronics, HV battery management system / Hybrid power electronics |
| Fuse ATO10A | 120 | Engine electronics |
| Fuse ATO15A | 121 | Engine/transmission/HV battery cooling |
| Fuse ATO5A | 122 | Engine electronics |
| Fuse ATO10A | 123 | DRIVE PILOT [AMG] |
| Fuse MINI7.5A | 124 | Starter motor 12 V |
| Fuse MINI5A | 128 | ABS / ASR / ESP / BAS / Electrical parking brake |
| Fuse MINI5A | 129 | Central control unit – front |
| Fuse MAXI40A | 136 | Secondary air injection pump |
| Fuse ATO5A | 139 | Engine electronics |
| Fuse ATO5A | 140 | 48V battery management system, AMG DYNAMIC SELECT, AMG Performance 4MATIC, Engine electronics |
| Fuse ATO7.5A | 141 | Engine electronics (48V) [6-cyl. diesel] |
| Fuse ATO10A | 142 | Automatic transmission, Voltage stabilising capacitor (Li-ion battery) |
| Fuse MINI20A | 143 | Engine/transmission/HV battery cooling [AMG] |
| Fuse MINI10A | 144 | DRIVE PILOT |
| Fuse MAXI40A | 146 | ABS / ASR / ESP / BAS / Electrical parking brake |
| Fuse MAXI30A | 146 | Engine/transmission/HV battery cooling [AMG] |
| Fuse MINI5A | 147 | ABS / ASR / ESP / BAS / Electrical parking brake [Except AMG] |
| Fuse MINI30A | 147 AMG | Engine/transmission/HV battery cooling [AMG] |
| — | 96 | Backup battery [Hybrid China] |
Interior Fuse Box Left Side
Opening and closing the fuse box in the cockpit
- Observe the notes on electrical fuses
- Fuse box 1 is on the driver’s side on the side of the cockpit under a cover.
- Open cover 1 in the direction of the arrow and remove it.
- Mercedes-Benz recommends you have the fuse box opened at an authorized Mercedes-Benz Center.
Fuse Box Diagram
| Type | No. | Description |
|---|---|---|
| Fuse MINI10A | 200 | Diagnostic socket |
| Fuse MINI5A | 201 | COMAND |
| Fuse MINI5A | 202 | HV battery management system / Hybrid power electronics, Hybrid service disconnect |
| Fuse MINI7.5A | 203 | Telephone systems |
| Fuse MINI10A | 204 | Engine electronics |
| Fuse MINI7.5A | 205 | 360-degree view camera / reversing camera |
| Fuse MINI7.5A | 206 | Dynamic driving seat, Seat adjustment / seat climate control – front |
| Fuse MINI7.5A | 208 | DRIVE PILOT |
| Fuse ATO30A | 209 | Central control unit – front |
| Fuse ATO10A | 210 | 48V battery management system, HV battery management system / Hybrid power electronics, On-board battery charger plug-in |
| Fuse ATO30A | 211 | Door operating functions – front left (LL), front right (RL), Front window lifters, Guard protection |
| Fuse ATO30A | 212 | Luxury seat heating – front |
| Fuse ATO30A | 213 | Left belt tensioner – front (LL), Right belt tensioner – front (RL) |
| Fuse ATO30A | 214 | Door operating functions – rear left (RL), Power window – rear (RL) |
| Fuse ATO30A | 215 | Seat adjustment / seat climate control – front |
| Fuse ATO25A | 216 | Air suspension, E-ACTIVE BODY CONTROL |
| Fuse MINI15A | 218 | Steering wheel heating / steering wheel adjustment |
| Fuse MINI5A | 219 | Head-Up Display [Entry] |
| Fuse MINI7.5A | 219 | Head-Up Display [High] |
| Fuse MINI7.5A | 220 | Perfume atomiser |
| Fuse MINI10A | 223 | COMAND |
| Fuse MINI10A | 224 | Instrument cluster |
| Fuse MINI7.5A | 225 | COMAND |
| Fuse MINI5A | 226 | A/C system / heater, Climate control control panel – front |
| Fuse MINI5A | 228 | COMAND |
| Fuse MINI5A | 229 | Telephone systems |
| Fuse MINI5A | 230 | ETC / Electronic Toll Collect |
Interior Fuse Box Right Side
Opening and closing the fuse box in the front passenger footwell
Requirements
- Observe the notes on electrical fuses
Fuse Box Diagram
| Type | No. | Description |
|---|---|---|
| Fuse ATO15A | 301 | Additional fuses for special-purpose vehicle, Special equipment for special protection (Guard) |
| Fuse ATO5A | 302 | Anti-theft alarm system |
| Fuse ATO5A | 303 | Auxiliary heating, COMAND, DRIVE PILOT, Emergency call system, Parking Assist, Telephone systems |
| Fuse ATO10A | 304 | Backup battery, Ignition lock, KEYLESS-GO |
| Fuse ATO5A | 305 | Anti-theft alarm system |
| Multi fuse block MUSB | 306 | Light/rain sensor |
| Multi fuse block MUSB | 307 | A/C system / heater – rear, Climate control panel – rear |
| Multi fuse block MUSB | 308 | HV battery management system / Hybrid power electronics, Starter motor 48V |
| Multi fuse block MUSB | 309 | Tyre pressure monitor |
| Multi fuse block MUSB | 310 | 48V battery management system |
| Multi fuse block MUSB | 311 | Backup battery, Ignition lock |
| Multi fuse block MUSB | 312 | CAR 2X COMMUNICATION |
| Multi fuse block MUSB | 313 | Airbag systems |
| Multi fuse block MUSB | 314 | A/C system / heater – rear, Climate control panel – rear |
| Multi fuse block MUSB | 315 | Auxiliary heating |
| Multi fuse block MUSB | 317 | AMG DYNAMIC SELECT |
| Fuse ATO7.5A | 318 | Airbag systems |
| Fuse ATO7.5A | 319 | AMG Performance 4MATIC, Automatic transmission, Backup battery, Ignition lock, KEYLESS-GO |
| Fuse ATO10A | 320 | Reading lamps – rear, Roof lamps, Sun visor mirror lighting |
| Fuse ATO7.5A | 322 | Dynamic driving seat, Seat adjustment / seat climate control – front |
| Fuse ATO10A | 323 | DISTRONIC PLUS, Driving assistance system |
| Fuse ATO7.5A | 324 | Driving assistance system |
| Fuse ATO7.5A | 325 | Telephone systems |
| Fuse ATO30A | 326 | Door operating functions – front left (RL), Door operating functions – front right (LL), Front window lifters, Guard protection |
| Fuse ATO30A | 327 | Seat adjustment / seat climate control – front |
| Fuse ATO30A | 328 | Door operating functions – rear left (LL), Power window – rear (LL) |
| Fuse ATO30A | 329 | Left belt tensioner – front (RL), Right belt tensioner – front (LL) |
| Fuse ATO7.5A | 330 | USB interface |
| Fuse ATO20A | 330 | USB Package Plus |
| Fuse ATO30A | 331 | COMAND |
| Fuse ATO30A | 332 | Luxury seat heating – front |
| Fuse ATO30A | 333 | Panoramic glass roof (MAGIC SKY CONTROL), Sliding sunroof, Roller blind for sliding sunroof / panoramic glass roof, Guard protection |
| Fuse ATO30A | 334 | Panoramic glass roof (MAGIC SKY CONTROL), Sliding sunroof, Roller blind for sliding sunroof / panoramic glass roof, Guard protection |
| Fuse ATO30A | 335 | AMG DYNAMIC SELECT |
Luggage Compartment Fuse Box
Opening and closing the fuse box in the trunk
Requirements:
- Observe the notes on electrical fuses
- Fold cover 1 down in the direction of the arrow.
Fuse Box Diagram
| Type | No. | Description |
|---|---|---|
| Fuse ATO7.5A | 401 | USB interface |
| Fuse ATO20A | 401 | USB Package Plus |
| Fuse ATO15A | 402 | Refrigerator box |
| Fuse ATO15A | 403 | 12V power socket, centre console, Cigar lighter, centre console |
| Fuse ATO15A | 404 | Engine Order Cancellation (EOC) / Road Noise Cancellation (RNC), Power socket in the boot |
| Fuse ATO15A | 405 | Cigar lighter – front |
| Fuse MINI5A | 407 | COMAND |
| Fuse MINI7.5A | 408 | Preparation Rear Seat Entertainment, Rear Seat Entertainment System |
| Fuse MINI5A | 409 | Telephone systems |
| Fuse MINI5A | 410 | Front contactless gesture control |
| Fuse MINI5A | 411 | Adaptive lighting in the rear |
| Fuse ATO10A | 412 | 115V/230V socket in the rear, Thermo cupholder |
| Fuse ATO20A | 413 | Auxiliary heating |
| Fuse ATO30A | 414 | Central control unit – rear |
| Fuse ATO25A | 415 | Fuel system |
| Fuse ATO30A | 416 | Door operating functions – rear right, Power window – rear |
| Fuse ATO30A | 417 | Dynamic driving seat |
| Fuse MAXI40A | 418 | BlueTEC, Rear axle steering [AMG] |
| Fuse MAXI50A | 419 | Heated rear window |
| Fuse MAXI40A | 420 | High-end sound system, Sound system |
| Fuse ATO30A | 421 | Central control unit – rear |
| Fuse ATO25A | 422 | 115V/230V socket in the rear |
| Fuse ATO30A | 423 | [AMG]: Engine Order Cancellation (EOC) / Road Noise Cancellation (RNC) |
| Fuse ATO30A | 424 | Individual luxury seats, seat heating – rear, Rear bench seat, seat heating |
| Fuse ATO20A | 425 | USB Package Plus |
| Fuse ATO30A | 426 | Remote boot lid closing/opening |
| Fuse MINI15A | 430 | HV battery management system / Hybrid power electronics |
| Fuse MINI7.5A | 431 | Communication module, Emergency call system |
| Fuse MINI7.5A | 432 | Driving assistance system |
| Fuse MINI10A | 433 | AMG DYNAMIC SELECT |
| Fuse MINI5A | 436 | Telephone systems |
| Fuse MINI7.5A | 437 | Ambient lighting |
| Fuse MINI7.5A | 438 | Parking Assist |
| Fuse MINI7.5A | 439 | Driving assistance system |
| Fuse MINI15A | 440 | A/C system / heater – rear |
| Fuse MINI5A | 441 | Remote boot lid closing/opening |
| Fuse MINI5A | 442 | BlueTEC |
| Fuse MINI7.5A | 445 | Telephone systems |
| Fuse MINI7.5A | 446 | Hybrid sound generator |
| Fuse MAXI40A | 447 | High-end sound system |
| Fuse ATO30A | 450 | Rear seat belt extenders, Seat adjustment / seat climate control – rear |
| Fuse ATO30A | 451 | Rear seat belt extenders, Seat adjustment / seat climate control – rear |
| Fuse ATO30A | 452 | Individual luxury seats, seat heating – rear |
| Fuse ATO15A | 453 | On-board battery charger plug-in |
| Fuse ATO7.5A | 454 | Dynamic driving seat |
| Fuse ATO7.5A | 455 | Dynamic driving seat |
| Fuse ATO20A | 457 | AMG Performance 4MATIC |
| Fuse ATO30A | 458 | Front/rear heated armrest |
| Fuse ATO30A | 459 | Sound system subwoofer |
| Fuse ATO5A | 465 | Telephone systems |
| Fuse ATO15A | 466 | Rear Seat Entertainment System |
| Fuse ATO7.5A | 469 | DRIVE PILOT |
| Fuse ATO15A | 471 | Panic alarm system control unit / special signal system |
| Fuse ATO20A | 471 | Panic alarm system control unit / Trailer coupling |
| Fuse ATO25A | 472 | Multifunction control unit for special-purpose vehicle |
| Fuse ATO25A | 473 | Multifunction control unit for special-purpose vehicle |
| Fuse ATO30A | 474 | Additional fuses for special-purpose vehicle, Trailer coupling |
| Fuse ATO20A | 475 | Trailer coupling |
| Fuse ATO30A | 475 | Special equipment for special protection (Guard) |
| Fuse ATO30A | 476 | Special equipment for special protection (Guard), Trailer coupling |
| Fuse ATO7.5A | 477 | Thermo cupholder |
| Fuse ATO15A | 478 | Panic alarm system control unit / special signal system |
| Fuse ATO30A | 478 | Panic alarm system control unit / Trailer coupling (30A) |
| Fuse ATO25A | 481 | Convenience rear doors |
| Fuse ATO20A | 481 | Special equipment for special protection (Guard) |
| Fuse ATO25A | 482 | Convenience rear doors |
| Fuse ATO20A | 482 | Special equipment for special protection (Guard) |
FAQ’s
Where is the fuse box located in the 2023 Mercedes S-Class?
The fuse box in the 2023 Mercedes S-Class is typically located in the engine compartment or the interior cabin, depending on the specific model and trim level.
What tools do I need to replace a fuse in the 2023 Mercedes S-Class?
Generally, you’ll need a pair of needle-nose pliers or a fuse puller tool to safely remove and replace a fuse in the 2023 Mercedes S-Class.
How do I identify a blown fuse in the 2023 Mercedes S-Class?
A blown fuse in the 2023 Mercedes S-Class can be identified by a visual inspection. If the metal strip inside the fuse is broken or melted, it indicates that the fuse has blown and needs to be replaced.
Useful Links
View Full User Guide: Mercedes-Benz S-CLASS SEDAN 2023 User Manual
2023 Mercedes Benz S-Class Specs, Price, Features, Mileage (Brochure)
Display Functions: 2023 Mercedes S-CLASS Multi-Display Guide