Fuses and relays Mercedes C-class (W204; 2007 - 2014)

The world premiere of the third generation Mercedes-Benz C-Class took place in Stuttgart in January 2007. The new sedan W204 looks aesthetically more perfect, has improved aerodynamics. A large grille, completely changed optics and a front bumper with a large air intake added a touch of aggressiveness. In this material, we will analyze in detail the fuse circuits for the Mercedes W204 body of the 3rd generation C-class (C180, C230, C280, C350, C63 AMG) 2007, 2008, 2009, 2010, 2011, 2012, 2103, 2014  release.

general view of the car

Here you will find the locations and photos of the fuse blocks. Separately, we note the elements responsible for the cigarette lighter and fuel pump.

In the trunk

location of the fuse box in the luggage compartment (sedan body only)
Block location (sedan body).

location of the fuse box in the luggage compartment (station wagon body only)
Fuse box location (station wagon body).


Access example.


General form.

Luggage block diagram
Models up to June 2009
No. Description A
F37 SRS system 7.5
F38   15
F39  Rear left door electrical control unit 30
F41 Rear right door electronics control unit 30
F42   20
F44 Seat multifunction switch (front right) 30
F45  Seat multifunction switch (front left) 30
F46   7.5
F49 Heated rear window 40
F50   50
F51   50
F53 Trailer control unit 30
F54 Trailer control unit
F56 Trailer control unit 15
F57 20
F58 30
F59 Parking system control unit 7.5
F61 Rear door open / close drive control unit 40
F67 Audio amplifier 40
F70 Tire pressure monitor control unit 5
F71 Cigarette lighter fuse w204 - C180, C230, C280, C350, C63 AMG.  15
F72   15
F74 Remote control unit for central locking and engine start 15
F76 Accessory power connector 15
F79 Parking system control unit 7.5
F81 Audio interface control unit 7.5
F83 Emergency call system 7.5
F84 Audio system
F87 Emergency call system 7.5
3 Heated rear window relay
6 Power seat relay
Models after June 2009
No. Appointment A
F37 SRS system 5
F38   15
F39 Rear left door electrical control unit 30
F41  Rear right door electronics control unit 30
F42 Fuel module (fuel pump) 20
F43   7.5
F44 Seat multifunction switch (front right) 30
F45 Seat multifunction switch (front left) 30
F46   7.5
F49 Heated rear window 40
F50 SRS system 50
F51 50
F53 Trailer control unit 30
F54 Trailer control unit
F56 Trailer control unit 15
F57 20
F58 20
F59 Parktrotnik 5
F60 Seat adjustment pump 7.5
F61 Rear door open / close drive control unit 40
F62   30
F63   30
F65 Suspension control unit 15
F67 Audio amplifier 30
F70 Tire pressure monitor control unit 5
F71 Cigarette lighter fuse w204 - C180, C230, C280, C350, C63 AMG.  15
F72   15
F73   7.5
F74 Remote control unit for central locking and engine start 15
F75 Additional heater control unit 20
F76 Accessory power connector 15
F81  Audio interface control unit 7.5
F82 Telephone 5
F83 Emergency call system 7.5
F84   7.5
F87 Emergency call system 7.5
F89   20
F91 ^ 06/10: Not used
3 Heated rear window relay
6 Power seat relay

In the passenger compartment

location of the fuse box in the passenger compartment
The fuse box is located on the driver's side at the end of the dashboard behind the protective cover.


Access example.

Mercedes 204 Interior fuse box diagram
No. A Decryption
116 30 Driver's seat control unit (up to 31.05.09)
117 15 Adaptive damping system control unit (up to 31.05.09)
118 - Reserve
119 7.5 Rear passenger compartment fan motor (up to 31.05.09)
AMG Performance Media control unit (up to 1.6.12)
120 - Reserve
121 -
122 -
123 10 Steering column electronics control unit
124 - Reserve
125 -
126 30 Front passenger seat control unit (up to 31.05.09)
127 - Reserve
128 -
129 20 Oil cooler fan motor relay (engine 156; up to 05/31/09)
130 - Reserve
131 -
132 -
133 -
134 -
135 -

In the engine compartment

location of the fuse box in the engine compartment
The fuse mounting block is located on the right side of the engine compartment. Up.


General form.

Diagram
No. Relay assignment
J Terminal 15
K Terminal 15R
L Spare
M Terminal 50, starter
N Terminal 87 motor
O Horn
P Catalyst purge
Q oil cooler fan
R Terminal 87 running gear
No. A Purpose of fuses
1 25 electronic stability control system ESP
2 30 front left door
3 30 Front door module on the right (up to 31.3.10)
4 7.5 Fuel pump fuse (gasoline engines)
Left fuel pump module (motor 156)
Right fuel pump module (motor 156)
Condensation sensor in the fuel filter with a heating element (engines 642, 651)
The control unit for the condensate sensor in the fuel filter with a heating element (motors 651 (up to 31.5.10), 646)
20 Headlight module (since 1.3.11)
5 7.5 Rear SAM unit with fuse and relay module
Relay for the coolant circulation circuit of the rear axle gearbox (engine 156 with 1.7.11)
Outdoor lighting switch (from 1.12.09)
6 10 CDI Block (Diesel Engines)
ME block (petrol engines)
7 20 Starter
8 7.5 Passenger restraint system module
9 15 Socket in the glove compartment
10 30 Wiper motor
11 7.5 Audio display / COMAND
Audio control panel / COMAND
Holder for navigation module
12 7.5 Climate control system control unit
Upper control panel
13 7.5 Steering column electronics control unit
Multifunctional camera (since 1.3.11)
14 7.5 Control unit for electronic stability control ESP
15 7.5 restraint system
passive safety systems 
16 5 Diagnostic connector (up to 31.5.09)
Electr. mobile phone plug connection (up to 2008)
electronic module of the selector lever (KP 722)
17 30 Panoramic sliding sunroof control module
overhead control panel
18 7.5 Outdoor lighting parting switch (up to 2008)
upper control panel (from 1.3.11)
Termination of the positive cable of the LIN data bus of the air conditioning system of the instrument panel (up to 28.2.
Electrical connector for passenger compartment and wiring harness for tail lamp
19 20 Electric steering lock unit
Electronic ignition lock unit
20 40 ESP motion stabilization system
21 7.5 Brake signal sensor
Glove compartment light switch
Seat occupied recognition, front passenger seat occupied AKSE
Electric fuse for preparation for installation of the Electronic Toll Collection system (Japan)
22 15 Internal combustion engine blower motor and air conditioner with integrated regulation
Electrical connector for interior wiring harness and engine wiring
Cable lug electr. terminal 87 circuit M2e (engine 271; South Korea), (engine 272; USA)
ME control unit (engine 271; South Korea)
Regeneration changeover valve (engine 271; South Korea), (engine 272; USA)
CDI system control unit (engines 642, 646)
Heating element in the ventilation duct of the engine crankcase (engine 642)
Cable lug electr. terminal 87 circuits (engine 646)
23 20 Electrical connector for interior wiring harness and engine wiring
Rear SAM control unit with fuse and relay module (diesel engines)
CDI control unit (diesel engines up to 2008)
Cable lug electr. terminal 87 circuits (diesel engines up to 2008)
Cable lug electr. circuit terminal 87 M1e (motor 271 up to 2008)
Cable lug electr. circuit terminal 87 M1i (motor 272 up to 2008)
24 15 Electrical connector for interior wiring harness and engine wiring
Radiator shutter actuator (motor 642)
CDI control unit (motor 646)
Cable lug electr. circuit terminal 87 M1i (motor 272 up to 2008)
Cable lug electr. terminal 87 circuits (diesel engines up to 2008)
25 15 ME control unit (engines 156, 271, 272, 274, 276)
Lambda probe in front of the catalytic converter (engine 651)
Exhaust gas generator control unit (engine 651)
26 20 Audio module
Audio module with Auto-Pilot system
COMAND module
27 7.5 Electronic ignition lock unit
electric steering lock (up to 2008)
BCDI (diesel engines)
ME (gasoline engines)
28 7.5 Instrument cluster
29 10 Front right headlamp
30 10 Front left headlamp
Electrical connector for wiring harness, passenger compartment and engine (engine 642)
31A 15 Left horn
Right horn
31B 15 Left horn
Right horn
32 40 Electric air pump (engines 156, 271, 272)
33 10 Electronic control unit for automatic transmission control (KP 722.6)
Fully integrated automatic gearbox control unit (KP 722.9)
34 7.5 Fuel pump control unit (motors 274, 276), (motors 271, 272, 651 from 1.6.09), (motor 642 from 01.12.09)
35 5 ESP motion stabilization system (since 2009)
36 7.5 DISTRONIC electrical module
Electro-hydraulic power steering (since 2009)
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