This information is for the following Mercedes-Benz C-Class (W204) models and years:

– 2007, 2008, 2009, 2010, 2011, 2012, 2013 and 2014 Mercedes-Benz C-Class (w204) C180, C200, C250 CGI; C180, C200, Kompressor; C230, C280, C300, C350, C63 AMG, C200, C220, C250, C320, C350 CDI.

There are 3 fuse boxes on the Mercedes-Benz C-Class (W204):

1 – Fuse Box located in the engine compartment


To access the engine compartment fuse box, open the hood and look on the right hand side. You’ll see a cover for the fuse box.

Open clamps and remove the fuse box cover.

Mercedes-Benz C-Class (W204) Engine Fuse Box Diagram


Description and Amperage

No.
Fused function
A
1 Electronic Stability Program control unit 25
2 Left front door control unit 30
3 Valid up to 31.3.10:
Right front door control unit
Valid as of 1.4.10 with model 204.0/2/9:
Right rear door control unit
30
4 up to 31.8.08:
Fuel pump control unit
Valid for engine 156 up to 31.8.08:Left fuel pump control unit
Right fuel pump control unit
Valid for engine 642, engine 651:
Fuel filter condensation sensor with heating element
Valid for engine 651 up to 31.5.10, engine 646:
Control unit for fuel filter condensation sensor 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 charcoal canister shutoff 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 Supplemental restraint system control unit 7.5
9 Glove compartment power outlet 15
10 Wiper motor 30
11 Audio/COMAND display
Audio/COMAND control panel
Holder for navigation module
7.5
12 Automatic air conditioning control and operating unit
Upper control panel control unit
7.5
13 Steering column module control unit
Multifunction camera
7.5
14 Electronic Stability Program control unit 7.5
Headlamp control unit 20
15 Supplemental restraint system control unit 7.5
16 Diagnostic connector (up to 31.5.09)
Mobile phone electrical connector
Valid for transmission 722: Electronic selector lever module control unit
5
ECO start/stop function:
Electric transmission oil pump
20
17 Panoramic sliding roof control module
Overhead control panel control unit
30
18 Valid up to 30.11.09:
Exterior lights switch
Valid for model 204.0/2 as of 1.3.11, model 204.3:
Upper control panel control unit
Valid for model 204.0/2 up to 28.2.11, model 204.9:
Instrument panel climate control LIN positive line connector sleeve
Vehicle interior and harness for taillamp 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 lamp switch
Glove compartment lamp switch
Front passenger seat occupied recognition and ACSR
Electronic Toll Collection preinstallation electrical fuse (Japan)
7.5
22 Combustion engine fan motor and air conditioning with integrated control
Electrical connector for interior harness and engine wiring harness
15
23 Electrical connector for interior harness and engine wiring harness
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 for interior harness and engine wiring harness
Interior and engine wiring harness electrical connector
Valid for engine 642:
Radiator shutters actuator
Valid for engine 272:
Terminal 87 M1e connector sleeve
Valid for diesel engine:
Terminal 87 connector sleeve
Valid for 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 upstream of catalytic converter
Valid as of 1.6.10 for model 204.3 with engine 651 Sport Edition:
Exhaust system sound generator control unit
15
26 Radio
Radio with auto pilot system
COMAND controller unit
20
27 Electric steering 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 front lamp unit 10
30 Left front lamp unit
Valid for engine 642:
Electrical connector for interior harness and engine wiring harness
10
31A Left fanfare horn
Right fanfare horn
15
31B Left fanfare horn
Right fanfare horn
15
32 Valid for engine 156, 271, 272, 276:
Electric air pump
40
Valid for engine 156:
Oil cooler fan motor
20
33 Valid for transmission 722.6:
Electronic transmission-control control unit
Valid for transmission 722.9:
Fully integrated transmission control controller unit
10
34 Valid for engine 271, 272 as of 1.9.08:
Fuel pump control unit
Valid for engine 156 as of 1.9.08:
Left fuel pump control unitRight fuel pump control unit
7.5
35 Valid as of 1.3.11:
Electronic Stability Program control unit
5
36 Valid as of 1.3.11:
DISTRONIC electric controller unit
Valid for model 204.902/982/984:
Electrohydraulic power steering
7.5
Relay
J Circuit 15 relay
K Terminal 15R relay
LL Backup relay
M Circuit 50 starter relay
O Engine circuit 87 relay
O Fanfare horn relay
P Valid for engine 156, 272, 276: Secondary air injection relay
Q Backup relay
R Chassis circuit 87 relay

2. Fuses in luggage compartment

To gain access to the fuse box on the right side of the trunk, open cover downwards in the direction of the arrow as pictured below.

Mercedes-Benz C-Class (W204) luggage compartment Fuse Box Diagram

Description and Amperage

No.
Fused function
A
37 as of 2008:
Driver seat NECK-PRO head restraint solenoid
Front passenger seat NECK-PRO head restraint solenoid
5
up to 2008:
Driver seat NECK-PRO head restraint solenoid
Front passenger seat NECK-PRO head restraint solenoid
7.5
38 Tailgate wiper motor 15
39 Valid for model 204.0/2/9 except vehicles for Great Britain up to 31.5.09:
Left rear door control unit
30
40 Spare
41 Valid for model 204.0/2/9 up to 31.3.10:
Right rear door control unit
Valid as of 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 as of 1.6.09 with automatic air conditioning:
Rear blower motor
5
44 Switch group, right front seat setting
Front passenger seat partially electric seat adjustment switch
30
45 Left front seat adjustment switch group
Driver seat partially electric seat adjustment switch
30
46 Antenna amplifier for rear window FM antenna
Alarm siren
Interior protection and tow-away protection control unit
Rear window antenna amplifier 1
TV 1 antenna amplifier and DAB Band III
DAB band III antenna
TV 2 antenna amplifier and KEYLESS-GO
KEYLESS-GO antenna amplifier
7.5
47 Spare
48 Spare
49 Rear window heater 40
50 Right front reversible emergency tensioning retractor 50
51 Left front reversible emergency tensioning retractor (A76) 50
52 Spare
53 as of 2008: Trailer recognition control unit 15
up to 2008: Trailer recognition control unit 30
54 up to 31.5.09: Trailer recognition control unit
Valid for model 204.075/077/275/277:
Driver seat lumbar support and side bolster adjustment switch group
Front passenger seat lumbar support and side bolster adjustment switch group
Front passenger seat AMG valve block
Driver seat AMG valve block
7.5
as of 1.6.09: Trailer recognition control unit 15
55 Valid as of 1.6.09
AdBlue
5
56 Trailer recognition control unit
Trailer socket
15
Valid for model 204.077/277/377 up to 31.5.09:
Driver seat lumbar support and side bolster adjustment switch group
Front passenger seat lumbar support and side bolster adjustment switch group
Front passenger seat AMG valve block
Driver’s seat AMG valve block
5
57 Trailer recognition control unit 20
58 as of 2008: Trailer recognition control unit 20
up to 2008: Trailer recognition control unit 30
59 as of 2008:
Parking system control unit
Left front bumper DISTRONIC (DTR) sensor
Right front bumper DISTRONIC (DTR) sensor
Intelligent radar sensor for left rear bumper
Intelligent radar sensor for right rear bumper
5
up to 2008: T
PARKTRONIC control unit
Radar sensors control unit
7.5
60 Multicontour seat pneumatic pump 7.5
61 Liftgate-control control unit 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 tube module control unit
15
66 Spare
67 as of 2008: Sound system amplifier control unit 30
up to 2008: Sound system amplifier control unit 40
68 Spare
69 Rear bass speaker amplifier 20
70 Tire pressure monitor control unit 5
71 Front cigarette lighter with ashtray illumination
Front vehicle interior power outlet
15
72 Cargo area connector box
115 V power outlet
15
73 Diagnostic connector (as of 1.6.09)
Stationary heater radio remote control receiver
Valid for engine 156 as of 1.7.11:
Transmission mode control unit
7.5
74 KEYLESS-GO control unit 15
75 Stationary heater unit 20
76 Vehicle interior power outlet 15
77 Weight Sensing 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 Media interface control unit 5
82 Cellular telephone system compensator UMTS
TV tuner control unit (up to 31.5.09; Japan)
Digital TV tuner (up to 31.5.09; 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
Backup camera power supply module
Backup camera control unit
360° camera control unit
7.5
85 TV tuner control unit (up to 31.5.09; Japan)
Digital TV tuner (as of 1.6.09; Japan)
7.5
86 DVD player 7.5
87 Emergency call system control unit 7.5
88 Valid as of 1.6.09
Spare
89 Valid as of 1.6.09:
Trailer recognition control unit
Valid as of 1.6.09 with engine 156:
Oil cooler fan motor relay
20
90 Valid as of 1.6.09
AdBlue® fuse block
AdBlue® supply relay
40
91 DC/AC converter control unit 25
ECO start/stop: Transmission oil auxiliary pump control unit
Valid for engine 642: Vent line heater element
20
92 Valid as of 1.6.09
Spare
Relay
A Terminal 15 relay
B Circuit 15R relay (1)
C Heated rear window relay
D Valid for diesel engine: Fuel pump relay
E Tailgate windshield wiper relay
F Seat adjustment relay
G Circuit 15R relay (2)

3. Fuses in Dashboard

To gain access to the fuses in the dashboard fuse box, pull out the dash side cover slightly at the bottom and remove it.

Mercedes-Benz C-Class (W204) Dashboard Description and Amperage

No.
Fused function
A
116 Driver seat control unit 30
117 Adaptive damping system control unit 15
118 Spare
119 Rear blower motor
AMG Performance Media control unit (valid as of 1.6.12)
7.5
120 Spare
121 Spare
122 Spare
123 Steering column tube module control unit 10
124 Spare
125 Spare
126 Front passenger seat control unit 30
127 Spare
128 Spare
129 Valid for engine 156: Oil cooler fan motor relay 20
130 Spare
131 Spare
132 Spare
133 Spare
134 Spare
135 Spare