Mercedes-Benz C-Class W204 (2007-2014) – fuse box

Mercedes-Benz C-Class w204 (2007-2014) – fuse box diagram

Year of production: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014.

Model: C180, C200, C250, C280, C300, C350, C63, AMG

READ:  Mercedes-Benz S-Class W221 (2005-2013) - fuse box

The Cigarette Lighter (Power Outlet) fuses on the Mercedes-Benz C-Class  are fuse # 9 (glove box power socket) in the engine compartment fuse box and fuses # 71 (front cigarette lighter, front interior power socket), # 72 (cargo space connector box, socket 115V power supply), # 76 (inside power socket) in the luggage compartment fuse box.

READ:  Mercedes-Benz B-Class W242, W246 (2012-2018) - fuse box

Fuse box in the engine compartment

Mercedes-Benz C-Class w204 – fuse box diagram – engine compartment
Number Description Amperes [A]
1 Electronic stability program control unit 25
2 Left front door control unit 30
3 Valid until 3/31/10:

Right front door control unit

Valid from 1.4.10 with model  204.0 / 2/9:

Right rear door control unit

30
4 until August 31, 2008:

Fuel pump regulator;

Valid for engine 156 until 08/31/08:

Fuel pump regulator – right and left;

Valid for engine 642, engine 651:

Fuel filter with condensation sensor; heating element;

Valid for engine 651 up to 31.5.10, engine 646:

Fuel filter condensation sensor controller with heating element.

7.5
Valid for diesel engine as of 1.9.08:

Fuel filter condensation sensor with heating element;

Valid for engine 276 (USA, South Korea):

Activated carbon container shut-off valve;

Valid for model 204.0 / 2/3 as of 1.3.11, 204.9 as of 1.6.12:

Headlamp control unit.

20
5 Rear SAM control unit with fuse and relay module;

Valid as of 1.6.10:

Exterior lights switch;

Valid for engine 156 Black Series as of 1.7.11:

Rear axle differential coolant circuit relay.

7.5
6 Valid for diesel engine:

ME-SFI [ME] control unit;

Valid for gasoline engine:

CDI control unit.

10
7 Starter 20
8 Supplementary restraint system control unit 7.5
9 Power socket in the glove box 15
10 Wiper motor 30
11 Audio / COMAND display;

Audio / COMAND control panel;

Navigation module holder.

7.5
12 Automatic air conditioning control and control unit;

Top control panel.

7.5
13 Steering column module control unit;

Multifunctional camera.

7.5
14 Electronic stability program control unit 7.5
Headlamp control unit 20
15 Supplementary restraint system control unit 7.5
16 Diagnostic connector (up to 5/31/09);

Electric cell phone connector;

Valid for gearbox 722:

Electronic gear lever module control unit.

5
ECO start / stop function:

Electric gear oil pump

20
17 Control module with panoramic sliding roof;

Control unit with a control panel.

30
18 Valid until 30/11/09:

Exterior lights switch;

Valid for model 204.0 / 2 as of 1.3.11, model 204.3:

Top control unit of the control panel;

Valid for model 204.0 / 2 to 28.2.11, model 204.9:

Air conditioning on the instrument panel;

LIN positive wire connector sleeve;

Vehicle interior and wiring harness for taillight electrical connector.

7.5
19 Electric steering lock control unit;

Electronic ignition lock control unit.

20
20 Electronic stability program control unit 40
21 Stop light switch;

Lamp switch in the glove box;

Front passenger seat occupancy recognition and ACSR electric fuse for electronic toll collection pre-installation (Japan).

7.5
22 Internal combustion engine fan motor and air conditioning with integrated controls;

Interior harness and engine harness electrical connector.

15
23 Interior harness and engine harness electrical connector;

Valid for diesel engine:

Rear SAM control unit with fuse and relay module;

CDI control unit;

Terminal 87 connector sleeve;

Valid for engine 271:

Terminal 87 M1e connector sleeve;

Valid for engine 272:

Circuit 87 M1i connector sleeve.

20
24 Electrical connector inside the wiring harness
and engine connections;

the interior harness and electric motor harness connector;

Important for Engine 642:

Drive Radiator Flaps;

Valid to engine 272:

Terminal 87 M1E Coupling sleeve;

Important for a diesel engine:

Compression sleeve 87 for the connector;

Valid to engine 646:

CDI control unit.

15
25 Valid for engine   156, 271, 272, 274, 276:

ME-SFI [ME] control unit;

Valid for diesel engine:

Oxygen sensor in front of the catalyst;

Valid from 1.6.10 for model 204.3 with engine 651 Sports version:

Exhaust sound generator control unit.

15
26 Radio;

Radio with an autopilot system;

COMAND control unit.

20
27 Electric steering wheel lock control unit;

Electronic ignition lock control unit;

Valid for diesel engine:

CDI control unit;

Valid for gasoline engine:

ME-SFI [ME] control unit.

7.5
28 Instrument cluster 7.5
29 Right headlight assembly 10
30 Left Headlight Assembly;

Valid for engine 642:

Electrical connector for interior harness and engine wiring harness.

10
31A Left horn;

Right horn.

15
31B Left horn;

Right horn.

15
32 Valid for engines 156, 271, 272, 276:

Electric air pump

40
Valid for engine 156:

Oil cooler fan motor

20
33 Valid for gearbox 722.6:

Electronic transmission control unit;

Valid for gearbox 722.9:

The fully integrated control unit control transmission.

10
34 Valid for engines 271, 272 as of 1.9.08:

Fuel pump controller ;

Valid for engine 156 as of 1.9.08:

Left fuel pump controller;

Right fuel pump controller.

7.5
35 Valid from 1.3.11:

Electronic stability program control unit.

5
36 Valid from 1.3.11:

Electric controller DISTRONIC;

Valid for model 204.902 / 982/984:

Electro-hydraulic power steering.

7.5
Relay
J. Circuit 15 relay
K. Terminal 15R relay
L Backup relay
M. Starter relay circuit 50
O Engine circuit 87 Relay
O Fanfare horn relay
P. Valid for engines 156, 272, 276:  

Secondary air injection relay

Q Backup relay
R Chassis circuit 87 relay 

Fuse box in the trunk

until May 31, 2009

Mercedes-Benz C-Class W204 – fuses diagram – trunk

from 1.06.2009

Mercedes-Benz C-Class W204 – fuses diagram – trunk
Number Description Amperes [A]
37 from 2008:

Driver’s seat Headrest electromagnet NECK-PRO;

Front passenger seat NECK-PRO headrest solenoid valve.

5
up to 2008:

Driver’s seat NECK-PRO headrest solenoid valve;

Front passenger seat NECK-PRO headrest solenoid valve.

7.5
38 Tailgate Wiper Motor 15
39 Valid for model 204.0 / 2/9 except UK vehicles up to 31.5.09:

Rear door control unit

30
40 Reserve
41 Valid for model 204.0 / 2/9 to 31.3.10:

Right rear door control unit ;

Valid from 1.4.10 

Right front door control unit ,

30
42 Valid for gasoline engine or engine 642 as of 1.12.09 or engine 651 as of 1.6.09:

Fuel pump control unit

25
Valid for engine 646 or engine 642 up to 30.11.09 or engine 651 up to 31.5.09:

Fuel pump;

Valid for gasoline engine (up to 2009):

Fuel pump control unit.

20
43 Valid from 1.6.09 with automatic air conditioning:

Rear blower motor

5
44 Switch group, right front seat setting;

Switch group, front passenger seat setting.

30
45 Left front seat adjustment switch group;

Left front driver seat adjustment switch group.

30
46 Antenna amplifier for rear window FM antenna;

Alarm siren;

Internal guard and anti-towing control unit;

Rear window antenna amplifier 1;

TV 1 antenna amplifier and DAB III band;

TV 2 antenna amplifier and DAB III band;

KEYLESS-GO. 

7.5
47 Reserve
48 Reserve
49 Rear window heating  40
50 Right front reversible emergency tensioner 50
51 Left front reversible emergency tensioner (A76) 50
52 Reserve
53 from 2008:

Trailer recognition control unit

15
up to 2008:

Trailer recognition control unit

30
54 to 31.5.09:

Trailer recognition control unit;

Valid for model 204.075 / 077/275/277:

Driver seat lumbar support and side support switch group;

Passenger seat lumbar support and side adjustment switch groups;

Front passenger seat AMG valve block;

Driver’s seat AMG valve block.

7.5
as of 1.6.09:

Trailer recognition control unit

15
55 Valid from 1.6.09:

AdBlue.

5
56 Trailer recognition control unit;

Trailer socket.

15
Valid for models 204.077 / 277/377 up to 31.5.09:

Driver seat lumbar support and side support switch group;

Front passenger seat lumbar support and side support adjustment switch groups;

AMG passenger seat Valve block;

Driver’s seat AMG valve block.

5
57 Trailer recognition control unit 20
58 from 2008:

Trailer recognition control unit

20
up to 2008:

Trailer recognition control unit

30
59 from 2008:

Parking system control unit;

Left front bumper DISTRONIC (DTR) sensor;

Right front bumper DISTRONIC (DTR) sensor;

Left rear bumper smart radar sensor;

smart rear right bumper radar sensor.

5
up to 2008:

PARKTRONIC control unit;

Radar sensors control unit.

7.5
60 Multicontour seat pneumatic pump 7.5
61 Liftgate controller 40
62 Driver seat control unit 30
63 Front passenger seat control unit 30
64 DC / AC converter control unit 25
65 Adaptive damping system control unit;

Steering column lever module control unit.

15
66 Reserve
67 from 2008:

Sound system amplifier control unit

30
up to 2008:

Sound system amplifier control unit

40
68 Reserve 20
69 Rear subwoofer amplifier 20
70 Tire pressure monitor control unit 5
71 Front cigarette lighter with ashtray lighting;

Interior power socket.

15
72 Cargo space junction box;

115V power socket

15
73 Diagnostic connector (from 1.6.09);

Stationary radio receiver for remote control of the heater;

Valid for engine 156 as of 1.7.11:

Transmission mode control unit.

7.5
74 KEYLESS-GO control unit 15
75 Stationary heater 20
76 Vehicle interior power socket 15
77 Mass detection system (WSS) control unit 7.5
78 Left front seat ventilation blower regulator;

Right front seat ventilation blower regulator.

7.5
79 Parking system control unit 5
80 Video and radar sensor system control unit;

Parking system control unit.

7.5
81 Multimedia interface control unit 5
82 Cellular telephone system compensator;

UMTS TV tuner control unit (up to 5/31/09; Japan);

Digital TV tuner (up to 5/31/09; Japan).

5
83 Electronic toll collection control unit (Japan);

Emergency call system control unit;

Reversing camera;

Left rear display;

Right rear display.

7.5
84 Satellite digital audio radio (SDAR) control unit;

SDAR / high definition tuner control unit;

Digital audio broadcasting control unit;

Reversing camera power module;

Reversing camera control unit;

360 ° camera control unit.

7.5
85 TV tuner control unit (up to 5/31/09; Japan);

Digital TV tuner (from 1.6.09; Japan).

7.5
86 DVD player 7.5
87 Emergency call system control unit 7.5
88 Valid from 1.6.09

Reserve

89 Valid from 1.6.09:

Trailer recognition control unit;

Valid as of 1.6.09 with engine 156:

Oil cooler fan motor relay.

20
90 Valid from 1.6.09:

AdBlue®  fuse block;

AdBlue®  supply relay.

40
91 DC / AC converter control unit 25
ECO start / stop:

Auxiliary gear oil pump control unit;

Valid for engine 642:

Heating element for the deaeration hose.

20
92 Valid as of 1.6.09:
Spare.
Relay
Terminal 15 relay
B Circuit 15R relay (1) 
C. Heated rear window relay
D Valid for diesel engine:

Fuel pump relay

E. Rear window wiper relay
F. Seat adjustment relay 
G. Circuit 15R relay (2) 

Instrument panel fuse panel

Location of the fuse box

The fuse box is located on the driver’s side of the instrument panel behind a cover.

Mercedes-Benz C- W204 – fuse diagram – instrument panel
Number Description Amperes [A]
116 Driver seat control unit 30
117 Adaptive damping system control unit 15
118 Reserve
119 Rear blower motor;

AMG Performance Media control unit (valid from 1.6.12).

7.5
120 Reserve
121 Reserve
122 Reserve
123 Steering wheel lamp module control unit 20
124 Reserve
125 Reserve
126 Front passenger seat control unit 30
127 Reserve
128 Reserve
129 Valid for engine 156:  

Oil cooler fan motor relay

20
130 Reserve
131 Reserve
132 Reserve
133 Reserve
134 Reserve
135 Reserve

Front pre-box (up to 2010)

Mercedes-Benz C W204 – fuse box diagram – front prefabricated box
Number Description Amperes [A]
88 Pyrofuse:

Alternator;

Starter.

89 Front SAM control unit with fuse and relay module 125
90 Rear SAM control unit with fuse and relay module 40
91 Internal combustion engine fan motor and air conditioning with integrated controls 80
100 Air conditioner housing 40
101 Valid for gasoline engine:  

Front SAM control unit with fuse and relay module

60
103 Valid for diesel engine: 

PTC heater amplifier

150
104 Internal fuse box 70
105 Front SAM control unit with fuse and relay module 100
106 Rear SAM control unit with fuse and relay module 150
107 Reserve
108 Reserve
109 Reserve
110 Reserve

since 2010

without ECO start / stop

Mercedes-Benz C-Class W204 – Fuse box diagram – front fuse box – without ECO start / stop

ECO start / stop

Mercedes-Benz C-Class W204 – fuse box diagram – front fuse box – with ECO start / stop
Number Description Amperes [A]
150 without ECO start / stop:

Pyrofuse 88

400
ECO start / stop:

Alternator;

Starter.

200
151 Internal combustion engine fan motor and air conditioning with integrated controls 100
152 Front SAM control unit with fuse and relay module 150
153 without ECO start / stop: 

Reserve

100
ECO start / stop function and front battery position:  

Front SAM control unit with fuse and relay module

60
154 ECO start / stop function and front battery position:

Front SAM control unit with fuse and relay module.

60
Valid for diesel engine and ECO start / stop:

PTC heater amplifier

150
155 without ECO start / stop:

Reserve

50
ECO start / stop function: 

Reserve

100
156 Valid for diesel engine without ECO start / stop:

PTC heating amplifier

150
ECO start / stop function:

Front SAM control unit with fuse and relay module

100
157 For model 204.902 / 982/984 without ECO start / stop function: 

Electro-hydraulic power steering;

ECO start / stop:  

Reserve.

100
158 without ECO start / stop:

Blower regulator

50
ECO start / stop:

Rear SAM control unit with fuse and relay module 

150
159 Special purpose vehicle multifunction control unit  50
ECO start / stop:

Additional battery relay

200
160 without ECO start / stop:

Reserve

60
ECO start / stop:

Blower regulator 

50
161 without ECO start / stop:

Front SAM control unit with fuse and relay module

100
Special purpose vehicle multifunction control unit  50
162 without ECO start / stop:

Reserve

100
ECO start / stop:

Reserve

60
163 without ECO start / stop:  

Rear SAM control unit with fuse and relay module

150
164 without ECO start / stop function: 

Rear SAM control unit with fuse and relay module

80

Rear pre-box

Location of the fuse box

It is located in the trunk (right-hand side), behind the lid.

Mercedes-Benz C W204 – fuse diagram – rear prefabricated box
Number Description Amperes [A]
111 Valid for gasoline engine: 

ME-SFI [ME] control unit

Valid for diesel engine:

CDI control unit

60
112 Special purpose vehicle multifunction control unit 80
113 Valid for engine 156:

Left fuel pump control unit;

Right fuel pump control unit.

40
114 Reserve
115 Special purpose vehicle multifunction control unit 100

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