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In this article, we consider the third-generation Mercedes-Benz A-Class (W176), produced from 2012 to 2018. Here you will find fuse box diagrams of Mercedes-Benz A160, A180, A200, A220, A250 2013, 2014, 2015, 2016, 2017 and 2018, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.
See other Mercedes-Benz A-Class:
Fuse Layout Mercedes-Benz A-Class 2013-2018
Cigar lighter (power outlet) fuses in the Mercedes-Benz A-Class are the fuses #70 (Rear center console socket), #71 (Luggage compartment socket) and #72 (Front cigarette lighter, interior power outlet) in the Passenger Compartment fuse box.
Table of Contents
Passenger Compartment Fuse Box
Passenger Compartment Fuse Box
Fuse box location
The fuse box is located under the floor near the passenger seat (remove the floormats and covering).
Fuse box diagram
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Assignment of the fuses and relay in the passenger compartment
| № | Fused function | Amp |
|---|---|---|
| 21 | Valid for diesel engine: PTC heater booster | 150 |
| 22 | Additional battery relay for ECO start/stop function | 200 |
| 23 | Left front door control unit | 30 |
| 24 | Right front door control unit | 30 |
| 25 | SAM control unit | 30 |
| 26 | ECO start/stop additional battery connector sleeve | 10 |
| 27 | Engine compartment fuse and relay module | 30 |
| 28 | Vehicle interior sound generator control unit | 5 |
| 29 | up to 02.11.2014: Trailer socket as of 03.11.2014: Trailer recognition control unit | 15 |
| 30 | Trailer recognition control unit | 5 |
| 31 | 4MATIC: All-wheel drive control unit | 5 |
| 32 | Steering column tube module control unit | 5 |
| 33 | Audio/COMAND control panel | 5 |
| 34 | ACC control and operating unit | 7.5 |
| 35 | Rear window heater | 40 |
| 36 | Driver seat control unit Driver seat lumbar support adjustment control unit | 7.5 |
| 37 | Audio/COMAND display | 7.5 |
| 38 | Supplemental Restraint System control unit | 7.5 |
| 39 | Overhead control panel control unit | 10 |
| 40 | Valid for engine 651 (Emissions standard EU6): Powertrain control unit | 15 |
| 41 | Panoramic sliding sunroof control module | 30 |
| 42 | Radio (Audio 5 USB, Audio 20 CD, Audio 20 CD with CD changer) COMAND controller unit | 5 |
| 42 | Radio (Radio 20, Audio 20 USB) | 25 |
| 43 | Parking system control unit | 5 |
| 44 | Left front reversible emergency tensioning retractor | 40 |
| 45 | Right front reversible emergency tensioning retractor | 40 |
| 46 | Front passenger seat control unit Front passenger seat lumbar support adjustment control unit | 7,5 |
| 47 | Navigation module iPhone® cradle control unit | 7,5 |
| 47 | Adaptive damping system control unit | 25 |
| 48 | Not used | - |
| 49 | Control unit for Drive Kit for iPhone® | 7,5 |
| 49 | COMAND fan motor | 5 |
| 50 | Camera cover control unit | 5 |
| 51 | Not used | - |
| 52 | Not used | - |
| 53 | Not used | - |
| 54 | Not used | - |
| 55 | Telematics services communications module KEYLESS-GO control unit | 5 |
| 56 | Steering column tube module control unit | 10 |
| 57 | Lane Keeping Assist: Special-purpose vehicle multifunction control unit | 30 |
| 57 | Special vehicle: Special-purpose vehicle multifunction control unit | 7,5 |
| 58 | Emergency vehicle fuse box | 30 |
| 59 | Front passenger seat control uni | 30 |
| 60 | Driver seat control unit | 30 |
| 61 | Sound system amplifier control unit | 40 |
| 62 | Valid for transmission 711: Electric steering lock control unit | 20 |
| 63 | Fuel system control unit | 25 |
| 64 | Electronic Toll Collection control unit Dedicated Short-Range Communications control unit | 1 |
| 65 | Glove compartment lamp | 5 |
| 66 | Emergency vehicle fuse box | 15 |
| 67 | Not used | - |
| 68 | Not used | - |
| 69 | Not used | - |
| 70 | Rear center console socket | 25 |
| 71 | Luggage compartment socket | 25 |
| 72 | Front cigarette lighter with ashtray illumination Vehicle interior power outlet | 25 |
| 73 | Electric parking brake control unit | 30 |
| 74 | Electric parking brake control unit | 30 |
| 75 | Trailer recognition control unit | 20 |
| 76 | Trailer recognition control unit | 25 |
| 77 | Trailer recognition control unit | 25 |
| 78 | Emergency vehicle fuse box | 40 |
| 79 | SAM control unit | 40 |
| 80 | SAM control unit | 40 |
| 81 | Blower regulator | 40 |
| 82 | Overhead control panel control unit | 10 |
| 83 | Electronic ignition lock control unit | 7,5 |
| 84 | Upper control panel control unit | 5 |
| 85 | ATA [EDW]/tow-away protection/interior protection control unit | 5 |
| 86 | FM, AM and CL [ZV] antenna amplifier as of 01.06.2016: Cellular telephone system antenna amplifier / compensator | 5 |
| 87 | Diagnostic connector | 10 |
| 88 | Instrument cluster | 10 |
| 89 | Exterior lights switch | 5 |
| 90 | Left rear bumper intelligent radar sensor Intelligent radar sensor for right rear bumper | 5 |
| 91 | Pedal operation monitor switch Footwell illumination switch | 5 |
| 92 | Fuel system control unit | 5 |
| 93 | Electric parking brake control unit | 5 |
| 94 | Supplemental Restraint System control unit | 7,5 |
| 95 | Front passenger seat occupied recognition and ACSR Weight sensing system (WSS) control unit | 7,5 |
| 96 | Tailgate wiper motor | 15 |
| 97 | Mobile phone electrical connector | 5 |
| 98 | SAM control unit | 5 |
| 99 | Tire pressure monitor control unit | 5 |
| 100 | Valid for engine 133: DIRECT SELECT INTERFACE | 5 |
| 101 | 4MATIC: All-wheel drive control unit | 10 |
| 102 | Stationary heater radio remote control receiver Valid for AMG vehicles as of 01.09.2015: Transmission mode control unit as of 01.06.2016: Antenna changeover switch for telephone and stationary heater | 5 |
| 103 | Emergency call system control unit Telematics services communications module HERMES control unit | 5 |
| 104 | Media interface control unit Multimedia connection unit | 5 |
| 105 | Digital Audio Broadcasting control unit Satellite digital audio radio (SDAR) control unit | 5 |
| 105 | Tuner unit | 7,5 |
| 106 | Multifunction camera | 5 |
| 107 | Digital TV tuner | 5 |
| 108 | up to 31.05.2016: Reversing camera | 5 |
| 108 | as of 01.06.2016: Reversing camera | 7,5 |
| 109 | Charging socket electrical connector | 20 |
| 110 | Radio COMAND controller unit Engine sound control unit | 30 |
| Relay | ||
| A | Circuit 15 relay | |
| B | Rear window wiper relay | |
| C | Circuit 15R2 relay | |
| D | Heated rear window relay | |
| E | Circuit 15R1 relay | |
| F | Circuit 30g relay | |
| G | Not used |
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Front Electrical Prefuse Box
Front Electrical Prefuse Box
| № | Fused function | Amp |
|---|---|---|
| 1 | Alternator | 300 |
| 2 | Vehicle interior fuse box | 200(petrol) 250(diesel) |
| 3 | Electrical power steering control unit | 100 |
| 4 | SAM control unit | 40 |
| 5 | Fan motor | 80 |
| 6 | Valid for engine 607: Fuel preheating control unit | 70 |
| 7 | Valid for engine 607 (Emissions standard EU5): DPF regeneration heater booster control unit | 125 |
| 8 | Valid for engine 607, 651: Glow output stage | 100 |
| Relay | ||
| F32kl | Decoupling relay |
Engine Compartment Fuse Box
Engine Compartment Fuse Box
Fuse box location
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Fuse box diagram
| № | Fused function | Amp |
|---|---|---|
| 201 | Alarm siren | 5 |
| 202 | Stationary heater control unit | 20 |
| 203 | LED headlamp: Right front lamp unit | 15 |
| 204 | Electronic Stability Program control unit | 25 |
| 205 | Left fanfare horn Right fanfare horn | 15 |
| 206 | Valid for engine 651: CDI control unit Valid for engine 607: Powertrain control unit | 5 |
| 207 | Valid for diesel engine: Circuit relay 87M | 5 |
| 208 | Valid for engine 133, 607: Circuit 87 relay | 7.5 |
| 209 | LED headlamp: Left front lamp unit | 15 |
| 210 | Heated windshield relay as of 01.09.2015: Starter front-end relay | 5 |
| 211 | Not used | - |
| 212 | Valid for engine 133, 270: Connector sleeve, circuit 87M3 Valid for engine 651: Vent line heater element Coolant thermostat heating element Exhaust gas recirculation cooler bypass switchover valve Valid for engine 607 (Emissions standard EU5): Oxygen sensor upstream of catalytic converter Boost pressure positioner Valid for engine 607 (Emissions standard EU6): Oxygen sensor upstream of catalytic converter Valid for engine 607: CDI control unit | 15 |
| 213 | Valid for engine 133, 270, 651: Connector sleeve, circuit 87 M2e Valid for engine 607 (Emissions standard EU5): Camshaft Hall sensor CDI control unit Quantity control valve Valid for engine 607 (Emissions standard EU6): Oxygen sensor downstream of catalytic converter CDI control unit | 15 |
| 214 | Valid for engine 133, 270, 651: Connector sleeve, circuit 87 M4e | 10 |
| 215 | Valid for gasoline engine: Cylinder 1 ignition coil Cylinder 2 ignition coil Cylinder 3 ignition coil Cylinder 4 ignition coil Valid for engine 651: Quantity control valve Valid for engine 607: CDI control unit Boost pressure positioner Quantity control valve | 20 |
| 216 | Valid for gasoline engine: ME-SFI control unit Valid for engine 607: Powertrain control unit | 5 |
| 217 | Valid with transmission 724: Dual clutch transmission fully integrated transmission control unit | 25 |
| 218 | Electronic Stability Program control unit | 5 |
| 219 | Not used | - |
| 220 | Transmission cooling coolant circulation pump | 10 |
| 221 | Not used | - |
| 222 | Not used | - |
| 223 | Not used | - |
| 224 | DISTRONIC electric controller unit COLLISION PREVENTION ASSIST controller unit | 7.5 |
| 225 | Not used | - |
| 226 | Not used | - |
| 227 | Not used | - |
| 228 | Not used | - |
| 229 | Left front lamp unit | 5 |
| 230 | Electronic Stability Program control unit | 5 |
| 231 | Right front lamp unit | 5 |
| 232 | Headlamp control unit | 15 |
| 233 | Not used | - |
| 234 | Valid for engine 607: Powertrain control unit | 5 |
| 235 | Valid for engine 607: Fan motor Radiator shutters actuator | 7.5 |
| 235 | Valid for engine 133: Charge air cooler circulation pump Charge air cooler circulation pump | 7.5 |
| 236 | SAM control unit | 40 |
| 237 | Electronic Stability Program control unit | 40 |
| 238 | Heated windshield | 50 |
| 239 | Wiper speed 1/2 relay | 30 |
| 240A | Starter circuit 50 relay | 25 |
| 240B | Circuit 15 relay (not latched) | 25 |
| 241 | Not used | 7.5 |
| Relay | ||
| J | Fanfare horn relay | |
| K | Wiper speed 1/2 relay | |
| L | Windshield wiper ON/OFF relay | |
| M | Starter circuit 50 relay | |
| N | Circuit relay 87M | |
| O | ECO start/stop: Transmission cooling coolant circulation pump relay | |
| P | Backup relay (F58kP) | |
| Q | Circuit 15 relay (not latched) | |
| R | Circuit 15 relay | |
| S | Circuit 87 relay | |
| T | Heated windshield relay |
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