Mercedes GLC X253 GLC-class crossover, which was produced in 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 with different engine options (250 4MATIC, 220d 4MATIC 30 and 200). During this time, the model has undergone restyling. In this publication you will find a description of the fuses and relays of the Mercedes x253 with block diagrams, photo examples of execution and their locations. Let’s highlight the cigarette lighter fuse.

The design of the blocks and the purpose of their elements may differ from those presented and depend on the year of manufacture and equipment level of your vehicle.

Blocks in the cabin

Block in the panel

In the cabin, the fuse and relay block is located on the left side of the instrument panel (on the driver’s side) behind a protective cover.

Description

20040A Front SAM control unit
20150A Front SAM control unit
20240A Alarm siren
20320A Valid for vehicles with KP 716: Electric steering column lock control unit
2045A Diagnostic connector
2057.5A Electronic ignition lock control unit
2065A Analog clock
20715A Heating, ventilation and air conditioning control unit
2087.5A Instrument cluster
2095A Air conditioning control panel
Control unit of the upper control panel
21010A Signals from the steering column electronic module control unit
211Reserve
212Reserve
2135A Signals from the ESP electronic stability control unit
214Reserve
215Reserve
2167.5A Glove box light bulb
2175A Japan: DSRC Toll Data Transmission Control Unit
2187.5A Passenger restraint system control unit (Supplemental Restraint System)
2195A Weight Sensing System Control Unit
220Reserve
Relay
FRelay terminals 15R

Power fuse block

A high-capacity fuse box can be installed in the front passenger’s footwell.

Description

  1. Engine compartment power fuse block
  2. 150A Hybrid: Auxiliary battery relay ECO Start-Stop function
  3. 40A Fan Controller
  4. Reserve
  5. 150A On vehicles with diesel engine: Additional electric heater
  6. 80A A-pillar fuse box right
  7. 150A Fuse and relay module in the rear of the cabin
  8. Reserve
  9. Reserve
  10. 60A Valid for vehicles with 725 transmission: Fully integrated transmission control unit 100A Hybrid with 724 transmission: Fully integrated transmission control unit
  11. Reserve
  12. 40A Fuse and relay module in the rear of the cabin
  13. 50A A-pillar fuse box right
  14. F32/4k2 – Quiescent current tripping relay

Location of additional elements

  • F96 – Fuses for terminal 30 of the auxiliary battery
  • F96/1 – Fuses terminal 87 damper in the exhaust tract

Block under the panel

Another fuse block is installed under the dashboard on the passenger side on the pillar behind the protective cover.

Marking

3015A Hybrid: Pyro fuse (F63) with high voltage disconnect device
30230A Front right door control unit
30330A Rear left door control unit
30420A Valid for vehicles with gearbox 722: Automatic gearbox servo module for DIRECT SELECT system
30530A Driver seat control unit
Driver’s seat heating control unit (until 05/31/2015)
Front seat heating control unit (from 01.06.2015)
30630A Front passenger seat control unit
Front passenger seat heating control unit (until 05/31/2015)
Front seat heating control unit (from 01.06.2015)
307Reserve
30830A USA: Electrical plug connection for the Elektric-Brake-Control function
30910A Emergency call system control unit
5A HERMES control unit
Telecommunications services communication module
310Reserve
31110A Electronic control of the additional fan in the rear of the cabin
31210A Ceiling control panel
31310A Hybrid: DC-DC converter control unit
314Reserve
3155A Transmission control unit
On vehicles with diesel engines: CDI control unit
On vehicles with a gasoline engine: ME control unit
3167.5A Passenger restraint system control unit (Supplemental Restraint System)
31730A Panoramic sliding sunroof control module (panoramic roof with sliding sunroof)
Sliding sunroof control module (sliding sunroof)
31820A Parking heater control unit
3195A Hybrid: High-voltage electric heater system
32015A AIR BODY CONTROL control unit
3215A Japan: DSRC Toll Data Transmission Control Unit
32220A Main unit
3235A Parking assistance system control unit
MF1/17.5A Audio system display/COMAND
Audio fan motor (COMAND APS)
MF1/27.5A Multifunctional Mono Camera
Multifunctional stereo camera
MF1/37.5A Rain and light sensor with additional functions
Ceiling control panel
MF1/47.5A Driver’s seat control unit
Driver’s seat heating control unit (until 05/31/2015)
Front seat heating control unit (from 01.06.2015)
MF1/57.5A Front passenger seat control unit
Front passenger seat heating control unit (until 05/31/2015)
Front seat heating control unit (from 01.06.2015)
MF1/67.5A Signals from the steering column electronic module control unit
MF2/15A Reversible front left seat belt tensioner
MF2/25A Audio control panel/COMAND
Touch panel (Audio 20 radio or COMAND APS)
MF2/35A Reversible front right seat belt tensioner
MF2/45A Projection Display
MF2/55A Multimedia device connection module
MF2/65A Hybrid: Electric air conditioning compressor
MF3/15A Readback wire terminal 30g of the SAM front control unit
MF3/25A Radar sensor control unit
MF3/3Reserve
MF3/45A Driver’s instrument panel button block
MF3/55A Rear air conditioning control panel
MF3/65A Tire pressure monitoring system control unit

Blocks under the hood

Fuse and relay block

In the engine compartment, under the hood on the left side, there is a main unit with fuses and relays.

Appointment

10040A Hybrid: Vacuum pump
10115A Terminal cable end sleeve 87/2
10220A Terminal cable end sleeve 87/1
10315A Terminal cable end sleeve 87/4
10415A Terminal cable end sleeve 87/3
10515A Valid for vehicles with gearbox 722.9 (except 722.930): Control unit for additional transmission oil pump
106Reserve
10760A Valid for engine 274.9: Electric cooling system pump
10820A LED static lighting headlights:
Front right headlight
High Performance LEDs or LED dynamic lighting headlights:
Front left headlight
Front right headlight
10930A Wiper motor
11020A LED static lighting headlights:
Front left headlight
High Performance LEDs or LED dynamic lighting headlights:
Front left headlight
Front right headlight
11130A Starter
11215A Hybrid: Accelerator pedal position sensor
113Reserve
11440A Compressor AIR BODY CONTROL systems
11515A Left horn and right horn
116Reserve
117Reserve
1185A Hybrid: Signals from the ESP electronic stability control unit
11915A Terminal 87 C2 Cable End Sleeve
1205A Terminal 87 C1 cable end sleeve
1215A Signals from the ESP electronic stability control unit
1225A Реле CPC
123Reserve
124Reserve
1255A SAM Front Control Unit
1265A Transmission control unit
On vehicles with diesel engines: CDI control unit
On vehicles with a gasoline engine: ME control unit
1275A Hybrid: Voltage drop limiter
1285A Front left headlight and exterior light switch
12930A Relay terminals 50 starters
129A30A Hybrid: Relay terminal 50 starter
Relay
GRelay terminal 15, engine compartment
HRelay terminals 50 starters
IHybrid: Vacuum Pump Relay (+)
JCPC relay
KValid for vehicles with gearbox 722.9 (except 722.930): Oil pump relay
LHorn relay
MWiper blade heating relay
NRelay terminals 87M
THERelay terminals 15 starter
PValid for engine 274.9: Cooling system pump relay
QHybrid: Vacuum pump relay (-)
RAIR BODY CONTROL relay systems

Power fuse block

Photo example

General decoding

1Reserve
2100A On vehicles with diesel engines: Glow plug output stage module
360A Engine Fuse and Relay Module
4On-board electrical system battery connector
5150A Motor Fuse and Relay Module
6125A Fuse and relay module, left
780A Fan motor
8125A Electric power steering control unit
9150A Fan Motor (1000W)
10200A Power fuse block in the passenger compartment
11Reserve
12Hybrid: Power electronic equipment control unit
USA: Catalyst heater control unit
13400A Generator
C1Hybrid: Trip relay
C2Hybrid: Terminal 31
C3/140A Signals from the ESP electronic stability control unit
C3/260A Signals from the ESP electronic stability control unit
F32/3k1Isolation relay

Block in the trunk

Another fuse and relay block is located in the trunk under a protective cover.

Description

40025A AdBlue® control unit
40115A AdBlue® control unit
40220A AdBlue® control unit
40330A Until 30.11.2015: Front passenger partially electric seat adjustment switch
25A From 01.12.2015: Switch for partially electric adjustment of the front passenger seat position
40430A Until 30.11.2015: Switch for partially electric adjustment of the driver’s seat position
25A From 01.12.2015: Switch for partially electric adjustment of the driver’s seat position
405Reserve
40630A Front left door control unit
407Reserve
40830A Rear right door control unit
409Reserve
41015A Remote control receiver for autonomous heater
Antenna switch for phone and autonomous heater
41130A Reversible front left seat belt tensioner
4127.5A Hybrid: Battery management system control unit
4135A Trunk lid drive control unit
4145A Tuner module (TV tuner, digital radio (DAB) or SIRIUS satellite radio)
4155A Camera cover control unit
Air aroma system generator
4167.5A Mobile antenna amplifier/compensator
Mobile phone contact board
4175A 360° camera control unit
Rear view camera
4185A Rear seat heating control unit
AIRSCARF system control unit
4195A Lumbar support adjustment control unit for the front passenger seat
4205A Driver’s seat lumbar support adjustment control unit
421Reserve
422Reserve
4235A Speaker amplifier control unit
42415A AIR BODY CONTROL Plus control unit
Valid for vehicles with engine 276: Motorsound control unit
425Reserve
426Reserve
427Reserve
428Reserve
429Reserve
430Reserve
43125A Multifunction control unit for special vehicles
43225A Multifunction control unit for special vehicles
43320A Trailer recognition system control unit
43430A Trailer recognition system control unit
43525A Trailer recognition system control unit
43615A Trailer recognition system control unit
43725A Trailer recognition system control unit
43830A AC/DC converter control unit
439Reserve
44030A Rear seat heating control unit
AIRSCARF system control unit
44130A AIRSCARF system control unit
44225A Fuel pump control unit
44330A Reversible front right seat belt tensioner
44415A Tablet PC Electrical Plug Connection
44515A Socket in the trunk
44615A Cigarette lighter with ashtray illumination in the front (socket in the passenger compartment)
44715A 12V socket in the center console of the rear passenger compartment on the right
44810A Valid for vehicles with gearbox 722, 725: Parking lock capacitor
449Indeed, vehicles with the 626 engine: Fuel filter element with built-in heating
Hybrid: Sound Generator
4505A Rear SAM control unit
4515A Fuel pump control unit
AdBlue® control unit
4525A Integrated radar sensor rear bumper outer right
Integrated radar sensor, rear bumper, outside left
Radar sensor in the rear bumper in the center
Radar sensor in the rear bumper on the outside right
Radar sensor in the rear bumper on the left
4535A Radar sensor in the front bumper on the left
Radar sensor in the front bumper, right
COLLISION PREVENTION ASSIST control module
4547.5A Valid for vehicles with KP 722: Control unit for fully integrated automatic transmission control system
5A AdBlue® control unit
4555A AC/DC converter control unit
4565A Front long-range radar sensor
DISTRONIC electrical control module
4575A Hybrid:
DC-DC converter control unit
Power electronic equipment control unit
4585A Keyless trunk lid opening module under the rear bumper
4595A Hybrid: Charger
46010A kEyLESS-GO control unit
4615A Antenna amplifier FM 1, AM, HF and KEYLESS-GO
46240A Speaker amplifier control unit
46330A Rear window heating (R1) due to faulty rear window condenser
46440A Trunk lid drive control unit
Tailgate control unit
46540A Rear SAM control unit
46640A Rear SAM control unit
46740A Valid for vehicles with engine 626: Fuel filter element with built-in heating
Relay
STerminal 15 interior relay
TRear window heating relay
INCupholder and 2nd row seat socket relay
InAdBlue ® relay
XRelay for the refrigerator box and sockets of the 1st row of seats/trunk
ANDBackup relay
ZR1Valid for vehicles with engine 626: Fuel filter heating relay
ZR2Backup relay
ZR3Backup relay

Fuses 445, 446, and 447 are responsible for the cigarette lighter.