In the following entry we present the diagrams and locations of fuse boxes and relays for the Mercedes-Benz GLA X156 from the years: 2014, 2015, 2016, 2017, 2018, 2019. The Mercedes-Benz GLA X156 is a compact crossover produced by the Mercedes-Benz brand from 2013 to 2020.
Checking and replacing fusesAs you know, fuses protect against overloading the electrical system of our cars. When one of the components stops working, it is most likely that the circuit breaker has tripped or the fuse has blown. Therefore, before repairing, you should check the fuse responsible for the given element. A blown fuse will be indicated by a melted or completely broken tape inside the fuse.
Remember this before replacing the fuse!
- remove the key from the ignition
- check if everything has been turned off
- always replace fuses with the same amperage.
Fuse box in engine compartment
| Number | Description | Amps [A] |
|---|---|---|
| 201 | Alarm siren | 5 |
| 202 | Stationary heater control unit | 20 |
| 203 | LED headlight: Right front combination lamp | 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 | For diesel engine: Circuit 87M relay | 5 |
| 208 | Valid for engine 133, 607: Relay circuit 87 | 7.5 |
| 209 | LED Headlight: Left Front Lamp Unit | 15 |
| 210 | Heated windshield relay | 5 |
| 211 | Unused | – |
| 212 | Valid for engines 133, 270: Connector sleeve, circuit 87M3 Valid for engine 651: Vent pipe heating elementCoolant thermostat heating element Exhaust gas recirculation cooler bypass switch 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 before 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 after catalytic converter CDI control unit | 15 |
| 214 | Valid for engines 133, 270, 651: Connector sleeve, circuit 87 M4e | 10 |
| 215 | Valid for petrol engine: Ignition coil cylinder 1Cylinder 2 ignition coilCylinder 3 ignition coilCylinder 4 ignition coilCylinder 4 ignition coilValid for engine 651:Quantity control valveValid for engine 607: CDI control unit Boost pressure positioner Quantity control valve | 20 |
| 216 | Valid for petrol engine: ME-SFI control unit Valid for engine 607: Powertrain control unit | 5 |
| 217 | Valid with gearbox 724:Dual clutch gearbox fully integrated gearbox control unit | 25 |
| 218 | Electronic stability program control unit | 5 |
| 219 | Unused | – |
| 220 | Coolant circulation pump for gearbox | 10 |
| 221 | Unused | – |
| 222 | Unused | – |
| 223 | Unused | – |
| 224 | DISTRONIC electric controllerCOLLISION PREVENTION ASSIST controller | 7.5 |
| 225 | Unused | – |
| 226 | Unused | – |
| 227 | Unused | – |
| 228 | Unused | – |
| 229 | Left front lamp | 5 |
| 230 | Electronic stability program control unit | 5 |
| 231 | Right front lamp | 5 |
| 232 | Headlight control unit | 15 |
| 233 | Unused | – |
| 234 | Valid for engine 607: Powertrain control unit | 5 |
| 235 | Valid for engine 607: Fan motor Radiator shutter actuator | 7.5 |
| 235 | Valid for engine 133: Charge air cooler circulation pumpCharge air cooler circulation pump | 7.5 |
| 236 | SAM control unit | 40 |
| 237 | Electronic stability program control unit | 40 |
| 238 | Heated windscreen | 50 |
| 239 | Wiper speed 1/2 relay | 30 |
| 240A | Starter circuit relay 50 | 25 |
| 240B | Circuit 15 Relay (Not Latched) | 25 |
| 241 | Unused | 7.5 |
| Relays | ||
| J | Fanfare Horn Relay | |
| K | Wiper speed 1/2 relay | |
| L | Windshield wiper on/off relay | |
| M | Starter circuit relay 50 | |
| N | Circuit Relay 87M | |
| ABOUT | ECO start/stop: gearbox 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 |
Passenger compartment fuse box
The fuse box is located in the front passenger footwell.
| Number | Description | Amps [A] |
|---|---|---|
| 21 | 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 | to 02.11.2014: Trailer socket from 03.11.2014: Trailer recognition control unit | 15 |
| 30 | Trailer recognition control unit | 5 |
| 31 | 4MATIC: all-wheel drive controller | 5 |
| 32 | Steering Column Tube Module Control Unit | 5 |
| 33 | Audio/COMAND Control Panel | 5 |
| 34 | ACC Control and Operation Unit | 7.5 |
| 35 | Rear window heating | 30 |
| 36 | Driver seat control unitDriver’s seat lumbar support adjustment control unit | 7.5 |
| 37 | Audio/COMAND display | 7.5 |
| 38 | Supplementary restraint system control unit | 7.5 |
| 39 | Overhead Control Panel Control Unit | 10 |
| 40 | For the 651 engine (EU6 emission standard): Powertrain control unit | 15 |
| 41 | Panoramic sliding roof control module | 30 |
| 42 | Radio (Audio 5 USB, Audio 20 CD, Audio 20 CD with CD changer) COMAND control unit | 5 |
| 42 | Radio (Radio 20, Audio 20 USB) | 25 |
| 43 | Parking system control unit | 5 |
| 44 | Left front reversible emergency tension retractor | 40 |
| 45 | Right front reversible emergency tension retractor | 40 |
| 46 | Front passenger seat control unitFront passenger seat lumbar support adjustment control unit | 7.5 |
| 47 | Navigation module | 7.5 |
| 47 | Adaptive Damping System Control Unit | 25 |
| 48 | Unused | – |
| 49 | Control unit for Drive kit for iPhone® | 7.5 |
| 49 | COMAND fan motor | 5 |
| 50 | Camera Cover Control Unit | 5 |
| 51 | Unused | – |
| 52 | Unused | – |
| 53 | Unused | – |
| 54 | Unused | – |
| 55 | Telematics services communication module KEYLESS-GO control unit | 5 |
| 56 | Steering Column Tube Module Control Unit | 10 |
| 57 | Lane Keeping Assist: Special Vehicle Multifunction Control Unit | 30 |
| 57 | Special vehicle: special vehicle multifunctional control unit; | 7.5 |
| 58 | Emergency Vehicle Fuse Box | 30 |
| 59 | Passenger seat control unit | 30 |
| 60 | Driver seat control unit | 30 |
| 61 | Sound system amplifier control unit | 40 |
| 62 | Valid for gearbox 711: Control unit for electric steering lock | 20 |
| 63 | Fuel system control unit | 25 |
| 64 | Electronic Toll Collection Control Unit Dedicated Short Range Communication Control Unit | 1 |
| 65 | Glove compartment light | 5 |
| 66 | Emergency Vehicle Fuse Box | 15 |
| 67 | Unused | – |
| 68 | Unused | – |
| 69 | Unused | – |
| 70 | Rear center console socket | 25 |
| 71 | Trunk socket | 25 |
| 72 | Front cigarette lighter with ashtray illumination Power socket inside the vehicle | 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 | Trunk Lid/Lift Lid Control Unit 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 control unit | 7.5 |
| 84 | Upper control panel control unit | 5 |
| 85 | ATA [EDW]/Towing protection/Interior protection control unit | 5 |
| 86 | FM, AM and CL antenna amplifier [ZV] from 01.06.2016: Antenna amplifier / compensator for mobile phone system | 5 |
| 87 | Diagnostic connector | 10 |
| 88 | Instrument cluster | 10 |
| 89 | External lights switch | 5 |
| 90 | Intelligent radar sensor, left rear bumperIntelligent radar sensor for right rear bumper; | 5 |
| 91 | Pedal operation monitor switchFootwell lighting switch | 5 |
| 92 | Fuel system control unit | 5 |
| 93 | Electric parking brake control unit | 5 |
| 94 | Supplementary restraint system control unit | 7.5 |
| 95 | Front passenger seat occupancy recognition and ACSR Weight sensing System (WSS) | 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 | For engine 133: DIRECT SELECTION INTERFACE | 5 |
| 101 | 4MATIC: all-wheel drive controller | 10 |
| 102 | Stationary radio receiver for remote control of the heater Valid for AMG vehicles from 01.09.2015: Gearbox mode control unit from 01.06.2016: Antenna switch for telephone and stationary heater | 5 |
| 103 | Emergency call system control unit Telematics services communication moduleHERMES control unit | 5 |
| 104 | Multimedia interface control unit Multimedia connection unit | 5 |
| 105 | Digital Audio Broadcasting Control UnitSatellite Digital Audio Radio (SDAR) Control Unit | 5 |
| 105 | Tuner unit | 7.5 |
| 106 | Multifunction camera | 5 |
| 107 | Digital TV tuner | 5 |
| 108 | until 31.05.2016: Reversing camera | 5 |
| 108 | from 01.06.2016: Reversing camera | 7.5 |
| 109 | Charging socket electrical connector | 20 |
| 110 | COMAND radio control unitEngine Sound Control Unit | 30 |
| Relays | ||
| A | Circuit 15 relay | |
| B | Rear window wiper relay | |
| C | Relay circuit 15R2 | |
| D | Heated rear window relay | |
| E | Relay circuit 15R1 | |
| F | 30g relay circuit | |
| G | Unused |
Front Electrical Fuse Box
| Number | Description | Amps [A] |
|---|---|---|
| 1 | Alternator | 300 |
| 2 | Vehicle interior fuse box | 200 |
| 2 | For diesel engine: Vehicle interior fuse box | 250 |
| 3 | Electric power steering controller | 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 (EU5 emission standard): Control unit supporting DPF regeneration heater | 125 |
| 8 | Valid for 607, 651 engines: Glow output stage | 100 |
| Relays | ||
| F32kl | Decoupling relay |
Mercedes-Benz GLA X156 (2014-2019) fuses and relays. Mercedes-Benz GLA X156 (2014-2019) fuse diagram.