Mercedes-Benz CLA C117 (2014-2019) – fuse box
Mercedes-Benz CLA C117 (2014-2019) – fuse box diagram
Year of production: 2014, 2015, 2016, 2017, 2018, 2019.
The cigarette lighter fuses (power socket) on the Mercedes-Benz CLA-Class are fuses 70 (rear center console socket), 71 (luggage compartment socket) and 73 (front cigarette lighter socket, internal power socket) in the passenger compartment fuse box.
Location of the fuse box
The fuse box is located under the floor near the passenger seat.
Remove the mats.
Fold out the perforated floor covering (1) in the direction of the arrow.
Press down on the retaining clip (2) to release the cover (3).
Tilt the cover (3) in the direction of the arrow towards the catch.
Pull off the cover (3) to the front.
The fuse location table (4) is located in the lower right part of the cover (3).
The scheme of the fuse box
Assignment of fuses and relays in the passenger compartment
| Number | Description | Amperes [A] |
|---|---|---|
| 21 | Valid for diesel engine:
PTC heater amplifier |
150 |
| 22 | Additional battery relay for the 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 | Additional ECO start / stop battery connector sleeve | 10 |
| 27 | Engine compartment fuse and relay module | 30 |
| 28 | Sound generator control unit in the interior of the vehicle | 5 |
| 29 | until 02/11/2014:
Trailer socket; as of November 3, 2014: Trailer recognition control unit. |
15 |
| 30 | Trailer recognition control unit | 5 |
| 31 | 4MATIC:
All-wheel drive controller. |
5 |
| 32 | Steering wheel lamp module control unit | 5 |
| 33 | Audio / COMAND control panel | 5 |
| 34 | ACC control and operating unit | 7.5 |
| 35 | Rear window heating | 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 | Suspended control unit control unit | 10 |
| 40 | Valid for engine 651 (EU6 emission standard):
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 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 tensioner | 40 |
| 46 | Front passenger seat control unit;
Front passenger seat lumbar support adjustment control unit. |
7.5 |
| 47 | Navigation module | 7.5 |
| 47 | Adaptive damping system control unit | 25 |
| 48 | Not used | – |
| 49 | Drive Kit control unit 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 communication module;
KEYLESS-GO control unit. |
5 |
| 56 | Steering wheel lamp module control unit | 10 |
| 57 | Lane Keeping Assistant:
multifunctional control unit for a special purpose vehicle. |
30 |
| 57 | Special vehicle:
multifunctional control unit for a special purpose vehicle. |
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 gearbox 711:
Electric steering lock. |
20 |
| 63 | Fuel system control unit | 25 |
| 64 | Electronic toll collection control unit;
Dedicated control unit for short-range communications. |
1 |
| 65 | Lamp in the glove box | 5 |
| 66 | Emergency vehicle fuse box | 15 |
| 67 | Not used | – |
| 68 | Not used | – |
| 69 | Not used | – |
| 70 | Rear center console socket | 25 |
| 71 | Trunk socket | 25 |
| 72 | Front cigarette lighter with ashtray lighting;
Vehicle interior power socket. |
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 / tailgate control unit;
Emergency vehicle fuse box. |
40 |
| 79 | SAM control unit | 40 |
| 80 | SAM control unit | 40 |
| 81 | Blower regulator | 40 |
| 82 | Suspended control unit control unit | 10 |
| 83 | Electronic ignition lock control unit | 7.5 |
| 86 | FM, AM and CL [ZV] antenna amplifier
from 01/06/2016: Antenna amplifier / compensator for a mobile phone system |
5 |
| 87 | Diagnostic connector | 10 |
| 88 | Instrument cluster | 10 |
| 89 | Exterior lights switch | 5 |
| 90 | Left rear bumper smart radar sensor;
Smart radar sensor for the right rear bumper. |
5 |
| 91 | Pedal operation monitor switch;
Footwell lighting 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 occupancy recognition i
ACSR weight detection 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 controller |
10 |
| 102 | Stationary heater remote control receiver
Valid for AMG vehicles from 01/09/2015: Transmission mode control unit from 01/06/2016: Antenna switch for telephone and heating |
5 |
| 103 | Emergency call system control unit;
Telematics services communication module; HERMES control unit. |
5 |
| 104 | Multimedia interface control unit;
Multimedia connection unit. |
5 |
| 105 | Digital Audio Broadcasting control unit;
Satellite digital audio radio (SDAR) control unit. |
5 |
| 105 | Tuner module | 7.5 |
| 106 | Multifunctional camera | 5 |
| 107 | Digital TV tuner | 5 |
| 108 | until May 31, 2016:
Reversing camera. |
5 |
| 108 | from 01/06/2016:
Reversing camera. |
7.5 |
| 109 | Electrical connector for the charging socket | 20 |
| 110 | COMAND radio control;
Engine sound driver. |
30 |
| Relay | ||
| A | Circuit 15 of the relay | |
| B | Rear window wiper relay | |
| C. | Relay circuit 15R2 | |
| D | Heated rear window relay | |
| E. | 15R1 circuit of the relay | |
| F. | Relay circuit 30g | |
| G. | Not used |
Fuse box in the engine compartment
| Number | Description | Amperes [A] |
| 201 | Alarm siren | 5 |
| 202 | Stationary heater control unit | 20 |
| 203 | LED headlight:
Right front lamp unit |
15 |
| 204 | Electronic stability program control unit | 25 |
| 205 | Left horn fanfare;
Right horn fanfare. |
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 relay 87 |
7.5 |
| 209 | LED headlight:
Left front lamp unit |
15 |
| 210 | Heated windshield relay | 5 |
| 211 | Not used | – |
| 212 | Valid for engines 133, 270:
Connector sleeve, circumference 87M3; Valid for engine 651: Heating element of the deaeration hose; Coolant thermostat heating element; Exhaust gas recirculation cooler bypass diverter valve; Valid for engine 607 (EU5 emission standard): Oxygen sensor in front of the catalyst; Boost pressure positioner; Valid for engine 607 (EU6 emission standard): Oxygen sensor in front of the catalyst; Valid for engine 607: CDI control unit. |
15 |
| 213 | Valid for engines 133, 270, 651:
Connector sleeve, circuit 87 M2e; Valid for engine 607 (EU5 emission standard): Camshaft; Hall sensor; CDI control unit; Quantity control valve; Valid for engine 607 (EU6 emission standard): 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 gasoline engine:
Cylinder 1 ignition coil; 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; 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 the 724 gearbox:
Dual clutch gearbox fully integrated gearbox control unit, |
25 |
| 218 | Electronic stability program control unit | 5 |
| 219 | Not used | – |
| 220 | Circulation pump for coolant to the gearbox | 10 |
| 221 | Not used | – |
| 222 | Not used | – |
| 223 | Not used | – |
| 224 | Electric controller DISTRONIC;
COLLISION PREVENTION ASSIST driver. |
7.5 |
| 225 | Not used | – |
| 226 | Not used | – |
| 227 | Not used | – |
| 228 | Not used | – |
| 229 | Left front lamp | 5 |
| 230 | Electronic stability program control unit | 5 |
| 231 | Right front lamp | 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 shutter 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 | Starter circuit relay 50 | 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 relay 50 | |
| N | Circuit relay 87M | |
| O | ECO start / stop:
Relay for gearbox coolant circulation pump |
|
| P. | Backup relay (F58kP) | |
| Q | Circuit 15 Relay (Not Latched) | |
| R | Circuit 15 relay | |
| S | Circuit 87 relay | |
| T. | Heated windshield relay | |
Front electric fuse box
Mercedes-Benz CLA-Class – fuse box diagram – front electric fuse box
| Number | Description | Amperes [A] |
| 1 | Alternator | 300 |
| 2 | Vehicle interior fuse box | 200 |
| Valid 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 heating control unit |
70 |
| 7 | Valid for engine 607 (EU5 emission standard):
Control unit supporting DPF regenerative heater |
125 |
| 8 | Valid for engines 607, 651:
Glow output stage |
100 |
| Relay | ||
| F32k1 | Decoupling relay | |