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Contents
Cigar lighter (power outlet) fuse in the Mercedes-Benz A-Class is the fuse #12 (Cigarette lighter, 12V socket in trunk) in the Passenger Compartment fuse box.
Table of Contents
The fuse box is located under the floor near the passenger seat (remove the floor panel, cover, and soundproofing).
Assignment of the fuses and relay in the passenger compartment
| № | Fused function | Amp |
|---|---|---|
| 1 | Gasoline engine: Control module, ISC (Idle speed control), AGR-Ventil, Lambda heater 1, Lambda heater 2, Diagnostic socket, Cruise control, Secondary air injection relay, Secondary air injection valve, Shut-off valve | 20 |
| 1 | Diesel engine: Diesel control module, Wastegate actuator, Throttle valve switchover valve, Exhaust gas recirculation pressure valve, Three-way catalytic converter temperature sensor | 10 |
| 2 | Gasoline/diesel engine control module, Ignition coils, Injection valves, FP relay module (coil), Electronic accelerator, Starter lockout relay | 25 |
| 3 | Electric fan (engine cooling), Electric fan (engine cooling) with air conditioning | 30 40 |
| 4 | Engine control module | 7.5 |
| 5 | Automatic clutch | 40 |
| 6 | FP relay module (gasoline) | 30 |
| 7 | Light module | 40 |
| 8 | Starter relay | 30 |
| 9 | Wiper motor | 40 |
| 10 | Rear wiper | 20 |
| 10 | Laminated roof | 40 |
| 11 | Combination switch (Wiper control, Headlamp flasher, Windshield washer pump (actuation)), RNS (Radio Navigations System) | 15 |
| 12 | Cigarette lighter, Glovebox illumination, Radio, CD changer, 12V socket in trunk | 30 |
| 13 | Front left power window or power window with excess force limiter Front right power window | 30 7.5 30 |
| 14 | Instrument cluster (time functions), Wipe/wash pump relay, Mobile phone | 15 10 |
| 15 | Airbag control module, ACSR sensor (automatic child seat recognition), Side airbag sensor, Side airbag sensor | 10 |
| 16 | Exterior rearview mirror adjustment, Exterior rearview mirror heater, Parktronic | 15 |
| 17 | Fanfare horn | 15 |
| 18 | Instrument cluster, Transponder and RFL (radio frequency locking), Motor electronics relay, Fan relay | 10 |
| 19 | Trailer coupling | 25 |
| 20 | Trailer coupling | 15 |
| 21 | Trailer coupling | 15 |
| 22 | Sound system | 25 |
| 23 | Make UP mirror illumination | 7.5 |
| 24 | Not assigned | |
| 25 | Not assigned | |
| 26 | Not assigned | |
| 27 | Not assigned | — |
| 28 | Instrument cluster, last Instrument cluster, last Excess force limiter control module (excess force limiter) | 10 |
| 29 | Central locking, Seat installation recognition unit | 15 |
| 30 | DAS transponder (drive authorization system) and RFL (radio frequency locking), Electric instrument cluster | 7.5 |
| 31 | Rear window defroster | 25 |
| 32 | Portable phone, Radio or RNS (Radio Navigations System), CD changer, Front dome lamp, Rear dome lamp | 15 |
| 33 | Front left power window, Front right power window | 30 |
| 34 | Heater booster/freeze protection (diesel) | 30 |
| 35 | ATA control module 2x light relay, Siren | 10 |
| 36 | Front heated seats | 25 |
| 37 | VGS program selector lever (fully integrated transmission control), Heater booster coolant circulation pump (diesel) | 10 |
| 38 | Air conditioning control module (A/C compressor), Blend air recirculation flap stepper motor, Interior sensor blower, Heated windshield washer nozzle | 10 |
| 39 | Light module, Backup lamp, manual transmission/ automatic clutch, VGS backup lamp (fully integrated transmission control) | 7.5 |
| 40 | Stop lamp, left, right and center (ABS brake signal), Steering angle sensor | 10 |
| 41 | Air conditioning control module, Diagnostic socket | 10 |
| 42 | Rear left power window, Rear right power window | 30 |
| 43 | ESP (Electronic stability program), Brake switch, NC contact | 15 |
| 44 | VGS control module (fully integrated transmission control) or automatic clutch | 10 |
| 45 | Interior blower or air conditioning interior blower | 30 |
| 46 | Central protection by fuses | 80 |
| 47 | Power steering pump | 60 |
| 48 | Diesel engine: Preglow control module | 60 |
| 48 | Gasoline engine: Secondary air injection (AIR) | 30 |
| Relay | ||
| R1 | Engine control (EC) relay | |
| R2 | Fuel pump relay | |
| R3 | ESP relay/TCM relay | |
| R4 | Heated rear window relay |
They are located in the side of the instrument panel on the driver’s side.
Light Control Fuses
| № | Fused function | Amp |
|---|---|---|
| 1 | Left low beam | 7.5 |
| 2 | Right low beam | 7.5 |
| 3 | Left main beam Right main beam Main beam indicator lamp (instrument cluster) | 15 |
| 4 | Left side lamp Left tail lamp | 7.5 |
| 5 | Right side lamp Right tail lamp 58K instrument cluster License plate lamps | 15 |
| 6 | Left/right fog lamp Left rear fog lamp | 15 |
Engine Compartment Relay Box
| № | Relay |
|---|---|
| 1 | Windscreen washer pump relay |
| 2 | Horn relay |
| 3 | Stop lamps inhibit relay |
| 4 | Starter motor inhibit relay |
| 5 | Engine coolant blower motor relay |
| 6 | ABS/ESP pump motor relay |
| 7 | Secondary air injection (AIR) pump relay (petrol) |
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