Mercedes-Benz C-Class W203 (2000-2007) – fuse box

Mercedes -Benz C-Class W203 (2000-2007) – fuse box diagram

Year of production: 2001, 2001, 2002, 2003, 2004, 2005, 2006, 2007.

READ:  Mercedes-Benz CL C215 (1998-2005) - fuse box

The cigarette lighter fuse (power socket) on the Mercedes C-Class W203 (2000-2007) is fuse 47 in the fuse box in the engine compartment.

Trunk fuse box

Mercedes-Benz C-Class W203 – fuse diagram – trunk
Number
Description
Amperes [A]
1 Front passenger seat adjustment control unit with memory;

Passenger seat partially electric adjustment switch.

30
2 Front driver seat adjustment control with memory;

Driver seat partially electric adjustment switch.

30
3 Dome lamp;

Right trunk lamp;

Left trunk lamp;

Radio remote control receiver STH.

7.5
TV tuner (up to 2/29/04)

TV tuner (MOST) (as of 1.4.04)

20
4 Fuel pump relay (N10 / 2kA) 20
5 Valid for engine 112.961 (up to 03/31/04):  

Charge air cooler circulation pump;

Valid without engine 112.961:  

Backup relay 2.

20
6 Reserve 25
7 Backup relay 1 7.5
8 Amplifier module, window antenna;

Alarm signal (H3);

ATA inclination sensor [EDW].

7.5
9 Control panel control unitsuspended. 25
10 Heated rear window 40
11 Reserve 20
12 Internal socket;

Applies to model 203.0, US version (up to 03/31/04):

Power socket.

15
13 Multicontour seat air pump

Voice control system control unit

Dome rear lamp

Dome rear lamp

PTS warning indicator

PTS control unit

 Japanese version : 

VICS + ETC Voltage supply separation point.

5
14 Tailgate Wiper Motor 15
15 Plug polarity reversal relayfuel filler 1;

Plug polarity reversal relay fuel filler 2.

10
16 Voice control system control unit 20
17 Trailer recognition control unit 20
18 Trailer hitch socket (13-pin) 20
19 Multicontour seat pneumatic pump 20
20 Rear window roller shutter relay

Valid for model 203.2 / 7 USA version:

Power socket

15
Relay
A Fuel pump relay
B Relay 2, terminal 15R
C. Backup relay 2
D Backup relay 1
E. Rear window defroster relay
G. Relay 1, terminal 15R
G. Filler cap relay, polarity reversal 1
H. Filler cap relay, polarity switch 2

Instrument panel fuse panel

Mercedes-Benz C-Class W203 – fuse diagram – instrument panel
Number
Description
Amperes [A]
21 Left front door control unit 30
22 Right front door control unit 30
23 Until 30/11/04:

Central gate control unit.

15
24 CD player with changer(in the glove box). 7.5
25 Top control panel control unit 30
26 Sound amplifier 25
27 Front seat adjustment control unit driver’s side, with memory;

Special multi-functional vehicle control unit

(SVMCU [MSS]).

30
28 Reserve 30
29 Driver’s side front seat adjustment control unit, with memory;

Driver’s side front seat adjustment control unit, with memory;

Multifunctional control unit for a special vehicle.

30
30 Heating systems recirculation unit 40
31 EIS driver [EZS];

Electric steering wheel lock control unit.

20
32 Left rear door control unit 30
33 Right rear door control unit 30
34 Cell phone separation point;

up to 31.5.01:

Telephone transmitter / receiver and TELE AID;

D2B telephone transmitter and receiver  ;

D2B telephone  interface;

E-net compensator;

up to 31.5.01, Japanese version  :

E-call control unit.

7.5
until 03/31/04:

Front passenger seat adjustment control unit with memory;

from 1.4.04:

Front passenger side seat adjustment control unit with memory;

to 31.5.03, Taxi:

Multifunctional control unit for a special vehicle;

from 1.6.03, Taxi:

multifunction control unit of a special vehicle;

from 1.6.01, Police  :

multifunction control unit for a special vehicle.

15
from 1.4.04:

Front passenger seat adjustment control unit with memory;

from 1.4.04 , Taxi:

Multifunctional control unit for a special vehicle.

30
35 until 03/31/04:

STH heater

30
from 1.4.04:

STH heater

20
36 until 03/31/04, Police:

Internal socket.

30
Valid for engine (612.990) (up to 2/29/04):

Charge air cooler circulation pump;

as of 1.4.04, Japanese version:

Audio gateway control unit.

15
Universal Portable CTEL Interface control unit(UPCI [UHI]) 7.5
37 Charge air cooler circulation pump;

to 29.2.04  :

Brake booster vacuum pump controller.

25
38 to 29.2.04:

Front passenger side seat adjustment control unit with memory;

from 1.4.04, Police:

Multifunctional control unit for a special vehicle

(SVMCU [MSS]).

30
39 Reserve 30
40 Front passenger side seat adjustment control unit with memory;

Universal portable CTEL control unit

(UPCI [UHI]);

Cell phone separation point;

Telephone interface;

Electric network compensator;

as of 1.6.01, MB Standard telephone:  

Telephone transmitter and receiver, D2B

as of 1.6.01, TELE AID:

Telephone transmitter / receiver and TELE AID, D2B

as of 1.6.01, Canadian vehicles:

Via boot lid separation point / FFS [RBA]

boot lid emergency release switch i

rear SAM control module with module

fuse-relay;

USA version:  

Via boot lid separation point / FFS [RBA]

boot lid emergency release switch i

rear SAM control unit with fuse i

relay module.

as of 1.4.04, Japanese version: 

E-call control unit.

7.5
up to 31.5.01:

Multifunctional control unit for a special vehicle

30
41 HEAT control and operating unit

up to 31.5.01:

AAC [KLA] control and operating unit

Comfort AAC control and operating unit [kLa]

7.5
as of 1.6.01:

AAC [KLA] control and service unit;

Comfortable control and operating unit AAC [KLA].

15
42 Instrument cluster 7.5

Fuse box in the engine compartment

Mercedes-Benz C-Class w203 – fuse box diagram – engine compartment
Number
Description
Amperes [A]
43a Horn relay 15
43b Horn relay 15
44 Telephone transmitter and receiver and TELE AID;

D2B telephone transmitter and receiver;

D2B cell phone separation point.

5
45 Control unit for restraint systems 7.5
46 Wiper switch on and off relay;

Wiper speed relay 1 and 2.

40
47 Glove box lighting with switch;

Front cigarette lighter (with illumination).

15
48 Valid for engine 612.990 (up to 31.3.04):  

Vacuum pump control unit brake assist;

Valid for engine 112 and engine 113:

Circuit connector sleeve 15 (with fuse);

Valid for engine 646 USA version (up to 03/31/04): 

Circuit 30 connector sleeve;

Valid for engine 646 (as of 1.4.04): 

O2 sensor upstream of TWC [kAt].

15
49 Control unit for restraint systems 7.5
50 Light switch module;

Valid for engine 612.990

The output stage  glow (to 31/03/04);

Hot foil mass air flow sensor

(1.4.04 to 30.11.04).

5
51 AAC with integrated auxiliary controlfan motor

Instrument cluster

Refers to code (581) for the comfort air conditioning

automatic:

C-AAC [K-KLA] multifunctional sensor

C-AAC [K-KLA] sun sensor (4 in total)

Left headlamp assembly

Right headlamp assembly

Applies to AMG vehicles:

Charge air cooler circulation pump

Valid for model 203.0 (up to 31.7.01):

SPS [PML] control unit

7.5
52 Starter 15
53 Valid for diesel engines:
Starter relay;

Rear SAM control unit with fuse and relay module;

Valid for engine 611/612/642/646:  

CDI control unit.

25
Valid for gasoline engines:

Starter relay;

Rear SAM control unit with fuse and

relay module;

Valid for engine 111/271/272:  

ME-SFI [ME] control unit;

Valid for engine 112/113: 

ME-SFI [ME] control unit;

Circuit 87M1e coupler sleeve.

15
54 Valid for engine 271.940:

ME-SFI [ME] control unit;

Purge control valve (US version);

Activated carbon tank shut-off valve ;

Valid for engine 271.942:  

NOX (nitrogen oxides) control unit;

Valid for engine 642/646: 

CDI control unit;

Valid for engine 642/646: 

Circuit connector sleeve 30.

15
Valid for engines 611/612:

CDI control unit;

Valid for engine 611/612 (until 30/11/04):

Heating element for deaeration hose.

7.5
55 Distronic steering angle sensor;

DTR control unit;

Valid for gearbox 722:

ETC control unit [EGS] (up to 31.5.04);

Electronic lever module control unit

gear changes;

Electric Control Unit (VGS);

Valid for gearbox 716:

Gear recognition switch;

Automatic manual gearbox control

gear unit.

7.5
56 ESP and BAS control unit;

Stop light switch.

5
57 Steering angle sensor (up to 31.5.02);

EIS control unit [EZS];

Steering column module (as of 1.6.02);

Valid for engine 112/113:

ME-SFI [ME] control unit.

5
58 Valid for transmission 716: 

hydraulic pump SEQ

40
59 ESP and BAS control unit 50
60 ESP and BAS control unit 40
61 Valid for transmission 716:  

Automatic manual gearbox control unit

15
62 Data link connector;

Light switch module;

Stop light switch.

5
63 Light switch module 5
64 Radio;

Radio and navigation unit;

Operating and display unit i

control COMAND.

10
65 Valid for engine 112/113:

Electric air pump.

40
Relay
J. Horn system relay
K. Terminal 87 relay, chassis
L Wiper speed relay 1 and 2
M. Terminal 15R relay
N SEQ pump control relay [ASG](with automatic manual transmission

Sequentronic (ASG))

O Air pump relay (112, 113, 271 engines only)
P. Terminal 15 relay
Q Wipers on and off relay
R Relay 87, engine
S Starter relay

Front case

Mercedes-Benz C-Class W203 – fuse box diagram – front fuse box
Number
Description
Amperes [A]
1 Internal fuse box 125
2 Rear SAM control unit with fuse andrelay module 200
3 Additional fuse holder l,spare wheel well. 125
4 Front SAM control unit with fuse andrelay module 200
5 Motor and electric AC suction fan withintegrated control.

Valid for diesel engines:

Glow power level.

125
6 Front SAM control unit with fuse andrelay module 60

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