10/5/23, 8:15 PM Mercedes-Benz C-Class W204 (2008-2014) fuses and relay diagram

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Mercedes-Benz C-Class W204 (2008-2014) fuses and relay diagram

 02/09/2020

Below you will find fuses and relay diagram for Mercedes-Benz C-Class W204 (2008-2014). If you want to
replace any fuses, make sure to replace it with the same color fuse or with the same ampere
fuse.Otherwise you could overload the wires or even cause more serious problems to that circuit if you
use a higher ampere fuse.

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(https://amzn.to/32PYYwW)

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10/5/23, 8:15 PM Mercedes-Benz C-Class W204 (2008-2014) fuses and relay diagram

You have to know that In the Mercedes-Benz C Class there are fuses box in four locations:

in the engine bay, on the left side of the car

(http://www.servicetutorials.com/wp-content/uploads/2020/09/mercedes-c-class-w204-engine-
compartment-fuse-box-panel-diagram.jpg)

on the left side of the dash, behind the cover

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(http://www.servicetutorials.com/wp-

content/uploads/2020/09/mercedes-c-class-w204-fuse-panel-box-relay-diagram-left-side-dash.jpg)

in the trunk (on the right side)

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(http://www.servicetutorials.com/wp-content/uploads/2020/09/mercedes-c-class-w204-fuse-panel-box-
relay-diagram-luggage-compartment.jpg)

in the passenger compartment on the right side, behind the cover

(http://www.servicetutorials.com/wp-content/uploads/2020/09/mercedes-c-class-w204-fuse-panel-box-
relay-diagram-passenger-compartment.jpg)

Below you can see the Mercedes-Benz C-Class fuse box diagrams: 
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10/5/23, 8:15 PM Mercedes-Benz C-Class W204 (2008-2014) fuses and relay diagram

Fuse Ampere
Symbol / Semnification
Position rating [A]

1 25A ABS/ASR/BAS/ESP

Ambient Lighting/ Central Locking / Cortesy Lights / Warning Lamps /

2 30A Exterior Mirror Function / Power window, front / Seat adjustment, front /
Steering wheel adjustment / Switch illumination

Ambient Lighting/ Central Locking / Cortesy Lights / Warning Lamps /

3 30A Exterior Mirror Function / Power window, front / Seat adjustment, front /
Switch illumination

4 7.5A Fuel Pump

5 7.5A lnstrument cluster

6 10A ABS/ASR/BAS/ESP / Engine Electronics / Fuel Pump / Starter

7 20A Starter

8 7.5A Airbag Systems

9 15A Socket front

10 30A Windshield wipers, front

11 7.5A Central Display

A/C System Heater/ Adaptive Damping System / PARKTRONIK system /

12 7.5A Rearwindow sunst¡ade / Seat heating, driver / Seat heating, front
passenger / Switch illumination

ABS/ASR/BAS/ESP / Fanfare Horn / Headlamp Flasher / Multi-f unction

13 7.5A steering wheel / Turn signal lamps / Windshield washer pump /
Windshield wipers, rear / Windshield wipers, front

14 7.5A ABS/ASR/BAS/ESP

15 7.5A Airbag Systems

ABS/ASR/BAS/ESP / Adaptive Damping System / Automatic Transmission /

16 5A
Diagnostic Socket
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Auto Dimming Rear View Mirror / Ceiling Lamps / Garage Door Opener /
17 30A Makeup mirror lamp / Panoramic glass roof / Rain sensor / Reading
lamps / Switch illumination / Tilting/Sliding sunroof

18 7.5A Exterior Lamp Switch / Hazard Warning Flasher

19 20A Engine Electronics / Fuel Pump / lgnition lock / Starter / Steering lock

20 40A ABS/ASR/BAS/ESP

ABS/ASR/BAS/ESP / Brake Lights / Glove Compartment Light / Mobile

21 7.5A
phone

22 15A Engine Electronics

23 20A Engine Electronics / Fuel Pump

24 15A Engine Electronics

25 15A Engine Electronics

26 20A COMAND / Radio systems / Satellite radio

27 7.5A Engine Electronics / Fuel Pump / lgnition lock / Starter / Steering lock

28 7.5A lnstrument cluster

29 10A Headlamp range adjustment

30 10A Headlamp range adjustment

31a /
15A Fanfare Horn
31b

32 40A Engine Electronics

33 10A Automatic Transmission

34 7.5A –

35 5A –

36 7.5A – 
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37 5A Airbag Systems / NECK-PRO

38 15A Rear window washer system

Ambient Lighting/ Cortesy Lights / Warning Lamps / Power window, rear /

39 30A
Switch illumination

40 – –

Ambient Lighting/ Cortesy Lights / Warning Lamps / Power window, rear /

41 30A
Switch illumination

42 20A Fuel Pump

43 5A CD Changer

44 30A Seat adjustment, front

45 30A Seat adjustment, front

Antenna Module / Anti Theft Alarm / lnterior motion sensor / Tow-away

46 7.5A
protection

47 – –

48 – –

49 40A Heated rear window

50 50A PRESAFE safety system

51 50A PRESAFE safety system

53 30A Trailer brake / Trailer hitching

54 7.5A Trailer hitching

56 15A Trailer hitching

57 20A Trailer hitching

58 30A Trailer hitching

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59 5A PARKTRONIK system

60 7.5A Multi-contour seats

61 40A Remote tailgate closing

67 40A Sound system

69 20A Control unit Height djustment

70 5A Tire pressure monitoring system

71 15A Cigar Lighter / Socket front

72 15A Socket, load compartment

74 15A KEYLESS-GO

75 20A Engine Electronics

76 15A Socket, rear

77 7.5A Airbag Systems

78 7.5A Socket front

83 7.5A TELE AID

84 7.5A Radio systems / Satellite radio

85 7.5A TV tuner

86 7.5A Rear compartment

87 7.5A TELE AID

116 30 A Seat adjustment, front/ Steering wheel adjustment

117 15 A Adaptive damping system control unit

118 – –

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AC in rear Compartment / AMG Performance Media control unit (valid as

119 7.5 A
of 1.6.12)

120 – –

121 – –

122 – –

123 10 A Steering column tube module control unit

124 – –

125 – –

126 30 A Seat adjustment, front

127 – –

128 – –

129 20 A Valid for engine 156: Oil cooler fan motor relay

130 – –

131 – –

132 – –

133 – –

134 – –

135 – –

Here you can see the Mercedes-Benz C-Class W204 (2008-2014) relay diagrams:

Fuse
Symbol / Semnification
Position
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A Backup relay

B Circuit 50 starter relay

C Circuit 15 relay

D Terminal 15R relay

E Engine circuit 87 relay

F Fanfare horn relay

G Valid for engine 156, 272, 276: Secondary air injection relay

H Backup relay

I Chassis circuit 87 relay

J Heated rear window relay

K Terminal 15 relay

L Seat adjustment relay

M Circuit 15R relay (2)

N Valid for diesel engine: Fuel pump relay

O Tailgate windshield wiper relay

P Circuit 15R relay (1)

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