Mercedes-Benz CLA C117 (2014-2019) – fuse box diagram
Year of manufacture: 2014, 2015, 2016, 2017, 2018, 2019.
Cigarette lighter fuses (power outlet) in Mercedes-Benz CLA-Class are the fuses 70 (center console rear socket), 71 (trunk socket) and 73 (front cigarette lighter socket, internal power socket) In the passenger compartment fuse box.
Fuse box location
The fuse box is located under the floor, near the passenger seat.
Remove the floor mats.
Unfold the perforated floor covering (1) in the direction of the arrow.
To release the cover (3), press the retaining clip (2).
Rotate the cover (3) in the direction of the arrow to capture it.
Remove the cover (3) forward.
The fuse arrangement table (4) is located on the lower right side of the cover (3).
Fuse box diagram
Fuse and relay assignment in the passenger compartment
| No. | Description | Amps [A] |
|---|---|---|
| 21 | Applies to the diesel engine:
PTC heater |
150 |
| 22 | Additional battery relay for ECO start/stop function | 200 |
| 23 | Front left door control unit | 30 |
| 24 | Front right door control unit | 30 |
| 25 | SAM control unit | 30 |
| 26 | Additional sleeve for ECO start/stop battery connection | 10 |
| 27 | Engine compartment fuse and relay module | 30 |
| 28 | Control unit for the sound generator inside the vehicle | 5 |
| 29 | until 02.11.2014 ..:
Trailer Socket; on 11/03/2014 ..: Trailer recognition control unit. |
15 |
| 30 | Trailer recognition control unit | 5 |
| 31 | 4MATIC:
Four-wheel drive controller. |
5 |
| 32 | Control unit of the direction light module | 5 |
| 33 | Audio Control Panel / COMAND | 5 |
| 34 | ACC control and operation unit | 7,5 |
| 35 | Rear Window Heater | 40 |
| 36 | Driver’s seat control unit;
Driver’s seat lumbar support adjustment control unit. |
7,5 |
| 37 | Audio Screen / COMAND | 7,5 |
| 38 | Control unit for supplementary restraint system | 7,5 |
| 39 | Hanging control panel control unit | 10 |
| 40 | Valid for engine 651 (EU6 emission standard):
Powertrain control unit |
15 |
| 41 | Control module for sliding panorama roof | 30 |
| 42 | Radio
(Audio 5 USB, Audio 20 CD, Audio 20 CD with CD changer); Control unit COMAND. |
5 |
| 42 | Radio (Radio 20, Audio 20 USB) | 25 |
| 43 | Parking system control unit | 5 |
| 44 | Left front reversible emergency voltage retractor | 40 |
| 45 | Emergency voltage reversible right front retractor | 40 |
| 46 | Front passenger seat control unit;
Control unit for adjusting the lumbar support of the passenger seat. |
7,5 |
| 47 | Navigation module | 7,5 |
| 47 | Control unit for adaptive damping system | 25 |
| 48 | Not used | – |
| 49 | Control unit for the Drive Kit for iPhone®. | 7,5 |
| 49 | COMMAND the fan motor | 5 |
| 50 | Camera lid control unit | 5 |
| 51 | Not used | – |
| 52 | Not used | – |
| 53 | Not used | – |
| 54 | Not used | – |
| 55 | Telematics services communication module;
KEYLESS-GO control unit. |
5 |
| 56 | Control unit of the direction light module | 10 |
| 57 | Lane assistance:
Multifunction control unit for special purpose vehicle. |
30 |
| 57 | Special vehicle:
Multifunctional control unit of a special purpose vehicle. |
7.5 |
| 58 | Fuse box for emergency vehicles | 30 |
| 59 | Front passenger seat control, uni | 30 |
| 60 | Driver’s seat control unit | 30 |
| 61 | Sound system amplifier control unit | 40 |
| 62 | Applies to the 711 gearbox:
Electric steering wheel lock. |
20 |
| 63 | Fuel system control unit | 25 |
| 64 | Electronic toll control unit;
Control unit dedicated to short-range communication. |
1 |
| 65 | Glovebox Light | 5 |
| 66 | Fuse box for emergency vehicles | 15 |
| 67 | Not used | – |
| 68 | Not used | – |
| 69 | Not used | – |
| 70 | Rear center console socket | 25 |
| 71 | Plug socket | 25 |
| 72 | Front cigarette lighter with ashtray;
Internal vehicle power socket. |
25 |
| 73 | Electric Parking Brake Controller | 30 |
| 74 | Electric Parking Brake Controller | 30 |
| 75 | Trailer recognition control unit | 20 |
| 76 | Trailer recognition control unit | 25 |
| 77 | Trailer recognition control unit | 25 |
| 78 | Boot lid/tailgate control;
Fuse box for emergency vehicles. |
40 |
| 79 | SAM control unit | 40 |
| 80 | SAM control unit | 40 |
| 81 | Fan controller | 40 |
| 82 | Hanging control panel control unit | 10 |
| 83 | Electronic ignition interlock control unit | 7,5 |
| 86 | FM, AM and CL Antenna Amplifier [ZV]
as of 01.06.2016: Cell phone system antenna amplifier/compensator |
5 |
| 87 | Diagnostic connector | 10 |
| 88 | Instrument cluster | 10 |
| 89 | External light switch | 5 |
| 90 | Smart radar sensor for the left rear bumper;
Smart radar sensor for the right rear bumper. |
5 |
| 91 | Foot pedal action monitoring switch;
Footwell illumination switch. |
5 |
| 92 | Fuel system control unit | 5 |
| 93 | Electric Parking Brake Controller | 5 |
| 94 | Control unit for supplementary restraint system | 7,5 |
| 95 | Front passenger seat occupancy recognition and
Control unit for the ACSR weight detection system (WSS) |
7,5 |
| 96 | Rear door wiper motor | 15 |
| 97 | Electrical connector for cell phones | 5 |
| 98 | SAM control unit | 5 |
| 99 | Control unit of the tire pressure monitor | 5 |
| 100 | Valid for engine 133:
DIRECT SELECTION INTERFACE |
5 |
| 101 | 4MATIC:
Four-wheel drive controller |
10 |
| 102 | Remote Control Stationary Heater Receiver
Valid for AMG vehicles from 01.09.2015: Transmission mode control unit as of 01.06.2016: Antenna switch for telephone and heating |
5 |
| 103 | Control unit for the emergency call system;
Communication module for the telematics service; HERMES control unit. |
5 |
| 104 | Multimedia interface control unit;
Multimedia interface control unit. |
5 |
| 105 | Digital audio broadcasting control unit;
Satellite digital audio broadcasting (SDAR) control unit. |
5 |
| 105 | Tuner Module | 7,5 |
| 106 | Multifunction device | 5 |
| 107 | Digital TV Tuner | 5 |
| 108 | until 31.05.2016:
Reversing camera. |
5 |
| 108 | as of 01.06.2016:
Reversing camera. |
7,5 |
| 109 | Electrical Charging Socket Connector | 20 |
| 110 | COMAND radio controller;
Engine sound controller. |
30 |
| Relay | ||
| A | Relay Circuit 15 | |
| B | Rear wiper relay | |
| C | Relay circuit 15R2 | |
| D | Heated rear window relay | |
| E | 15R1 relay circuit | |
| F | Relay circuit 30g | |
| G | Not used |
Fuse box in engine compartment
| No. | Description | Amps [A] |
| 201 | Alarm siren | 5 |
| 202 | Stationary heater control unit | 20 |
| 203 | LED Reflector:
Right Front Lamp Unit |
15 |
| 204 | Electronic Stability Program Control Unit | 25 |
| 205 | Left-hand fanfare horn;
Right fanfare horn. |
15 |
| 206 | Valid for the 651 engine:
CDI control unit; Valid for the 607 engine: Powertrain control unit. |
5 |
| 207 | Refers to Diesel engine:
Relay circuit87M |
5 |
| 208 | Valid for engine 133, 607:
Relay for circuit 87 |
7,5 |
| 209 | LED spotlight:
Front left lamp unit |
15 |
| 210 | Heated windscreen relay | 5 |
| 211 | Not used | – |
| 212 | Valid for 133, 270 engines:
Coupling sleeve, circuit 87M3; Valid for 651 motor: Heating element of the vent line; Heating element for the refrigerant thermostat; Exhaust gas recirculation bypass valve; Valid for engine 607 (emission standard EU5): Oxygen sensor before the catalytic converter; Positioner boost pressure; Valid for engine 607 (emission standard EU6): Oxygen sensor before the catalytic converter; Valid for 607 engine: CDI control unit. |
15 |
| 213 | Valid for engines 133, 270, 651:
Coupling sleeve, circuit 87 M2e; Valid for engine 607 (emission standard EU5): Camshaft; Hall Sensor; CDI control unit; Quantity control valve; Valid for engine 607 (emission standard EU6): Oxygen sensor after catalytic converter; CDI control unit; |
15 |
| 214 | Valid for engines 133, 270, 651:
Coupling sleeve, circuit 87 M4e. |
10 |
| 215 | Valid for gasoline engine:
Ignition coil Cylinder 1; Cylinder 2 ignition coil; Cylinder 3 ignition coil; Cylinder 4 ignition coil ; Cylinder 4 ignition coil; Valid for engine 651: Quantity control valve; Valid for engine 607: CDI control unit; Pressure Positioner Load; Quantity control valve; |
20 |
| 216 | Valid for gasoline engine:
ME-SFI control unit; Valid for engine 607: Powertrain control unit. |
5 |
| 217 | Valid with 724 gearbox:
Dual-clutch transmission fully integrated gearbox control unit, |
25 |
| 218 | Electronic Stability Program Control Unit | 5 |
| 219 | Not used | – |
| 220 | Coolant circulation pump for gearbox | 10 |
| 221 | Not used | – |
| 222 | Not used | – |
| 223 | Not used | – |
| 224 | DISTRONIC electrical controller;
COLISION PREVENTION ASSIST controller. |
7,5 |
| 225 | Not used | – |
| 226 | Not used | – |
| 227 | Not used | – |
| 228 | Not used | – |
| 229 | Front left bulb | 5 |
| 230 | Electronic Stability Program Control Unit | 5 |
| 231 | Right headlight | 5 |
| 232 | Headlight control unit | 15 |
| 233 | Not used | – |
| 234 | Valid for the 607 engine:
Powertrain Control Unit |
5 |
| 235 | Valid for the 607 engine:
Fan motor; Radiator louvre actuator. |
7,5 |
| 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 windscreen | 50 |
| 239 | Wiper speed 1/2 relay | 30 |
| 240A | Start Circuit Relay 50 | 25 |
| 240B | Relay for circuit 15 (not latched) | 25 |
| 241 | Not used | 7,5 |
| Relay | ||
| J | Fanfare horn relay relays | |
| K | Wiper speed 1/2 relay | |
| L | Windshield wiper on/off relay | |
| M | Start Circuit Relay 50 | |
| N | Relay circuit87M | |
| O | ECO start/stop: transmission coolant circulation pump relay | |
| P | Reservation courier (F58kP) | |
| Q | Relay for circuit 15 (not latched) | |
| R | Circuit 15 relay | |
| S | Circuit 87 relay | |
| T | Heated windscreen relay | |
Front electric fuse box
| No. | Description | Amps [A] |
| 1 | Alternator | 300 |
| 2 | Vehicle interior fuse box | 200 |
| Applies to the diesel engine:
Inner vehicle fuse box |
250 | |
| 3 | Electric power steering controller | 100 |
| 4 | SAM control unit | 40 |
| 5 | Fan motor | 80 |
| 6 | Valid for the 607 engine:
Fuel heater control unit |
70 |
| 7 | Valid for engine 607 (EU5 emission standard):
DPF regenerative heating control unit |
125 |
| 8 | Valid for 607, 651 engines:
Light output stage |
100 |
| Relay | ||
| F32k1 | Decoupling Relay | |
