Mercedes-Benz Classe C W203 (2000-2007) fuses and relays. Mercedes-Benz Classe C W203 (2000-2007) fuse diagram.

Mercedes-Benz C-Class W203 (2000-2007) – fuse box diagram
Year of production: 2001, 2001, 2002, 2003, 2004, 2005, 2006, 2007.

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

Number	Description	Ampere [A]
1	Front passenger seat adjustment control unit with memory; Passenger seat with partially electric adjustment switch.	30
2	Front driver’s seat adjustment control with memory; Partially electric driver’s seat adjustment switch.	30
3	Dome lamp;Right rear light;Left rear light;STH radio control receiver.	7.5
	TV Tuner (until 29/02/04)TV Tuner (MOST) (from 1.4.04)	20
4	Fuel pump relay (N10 / 2kA)	20
5	Valid for engine 112.961 (until 03/31/04):   Intercooler circulation pump;Valid without engine 112.961:  Spare relay 2.	20
6	Reserve	25
7	Backup relay 1	7.5
8	Amplifier module, window antenna; Alarm signal (H3);ATA Tilt Sensor [EDW].	7.5
9	Control panel of the suspended control unit.	25
10	Heated rear window	40
11	Reserve	20
12	Internal socket; Applies to  model 203.0, US version (until 03/31/04):Power socket.	15
13	Multi-contour seat air pumpVoice control system control unitDomed rear lightDomed rear lightPTS warning indicatorPTS control unit  Japanese  version : VICS + ETC Voltage supply separation point.	5
14	Tailgate wiper motor	15
15	Fuel supply plug polarity reversal relay 1;Plug polarity reversal relayrefueling 2.	10
16	Voice control system control unit	20
17	Trailer recognition control unit	20
18	Towbar socket (13 pin)	20
19	Multi-contour 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	Fuel cap relay, polarity reversal 1
H	Fuel cap relay, polarity switch 2

Instrument panel fuse panel

Number	Description	Ampere [A]
21	Front left door control unit	30
22	Front right door control unit	30
23	Until 11/30/04: Gate control unit.	15
24	CD player with changer (in the glove compartment).	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 multifunctional 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;Multifunction control unit for a special vehicle.	30
30	Heating system recirculation	40
31	EIS driver [EZS];Electric steering lock control unit.	20
32	Rear left door control unit	30
33	Rear right door control unit	30
34	Cell phone separation point; until 31.5.01:Telephone transmitter/receiver and TELE AID;D2B Telephone Transmitter and Receiver   ;D2B  telephone   interface ;E-net compensator;until 5/31/01, Japanese version   :Electronic call center.	7.5
	until 03/31/04   : Front passenger seat adjustment control unit with memory;from 1.4.04:Front passenger seat adjustment control unit with memory;as of 5/31/03,  Taxi:Multifunction control unit for 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:Multifunction control unit for a special vehicle.	30
35	until 31/03/04   :STH heater	30
	from 1.4.04   :STH heater	20
36	until 03/31/04, Police: Internal capture.	30
	Valid for engine (612.990) (until 02/29/04): Intercooler 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	Intercooler circulation pump; as of 29.2.04   :Brake booster vacuum pump controller.	25
38	as of 29.2.04: Front passenger seat adjustment control unit with memory;from 1.4.04, Police:Multifunction control unit for a special vehicle(SVMCU [MSS]).	30
39	Reserve	30
40	Front passenger seat adjustment control unit with memory; Universal portable control unit CTEL(UPCI [UHI]);Cell phone separation point;Telephone interface;Electric network compensator;from 1.6.01, MB Standard Phone:  Telephone transmitter and receiver, D2Bfrom 1.6.01, TELE HELP:Telephone Transmitter/Receiver and TELE AID,  D2BStarting 6/1/01, Canadian vehicles:Via trunk lid separation point / FFS [RBA]trunk lid emergency release switch iRear SAM control module with modulefuse-relay;US Version:  Via trunk lid separation point / FFS [RBA]trunk lid emergency release switch iRear SAM control unit with fuse irelay module.as of 1.4.04, Japanese version: Electronic call center.	7.5
	until 31.5.01: Multifunction control unit for a special vehicle	30
41	HEAT control and command unit until 31.5.01:AAC Command and Control Unit [KLA]Comfort AAC control and command unit [kLa]	7.5
	from 1.6.01: AAC Control and Maintenance Unit [KLA];Convenient AAC [KLA] control and command unit.	15
42	Instrumentation	7.5

Fuse box in the engine compartment

Number	Description	Ampere [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	Windshield wiper on/off relay;Wiper speed relay 1 and 2.	40
47	Glove compartment lighting with switch; Front cigarette lighter (with lighting).	15
48	Valid for engine 612.990 (until 31.3.04):   Vacuum pump control unitbrake assist;Valid for engine 112 and engine 113:Circuit connector sleeve 15 (with fuse);Valid for 646 engine USA version (until 03/31/04): Circuit connector sleeve 30;Valid for 646 engine (from 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 612.990The   output stage glow (until 03/31/04);Hot-sheet mass air flow sensor(from 1.4.04 to 30.11.04).	5
51	AAC with integrated auxiliary controlfan motorInstrumentationRefers to code (581) for comfort air conditioningautomatic:C-AAC Multifunction Sensor [K-KLA]Solar Sensor C-AAC [K-KLA] (4 total)Left light clusterRight light clusterApplies to  AMG vehicles:Intercooler circulation pumpValid for model 203.0 (until 31.7.01):SPS Control Unit [PML]	7.5
52	Appetizers	15
53	Valid for diesel engines:
	Starter relay;Rear SAM control unit with fuse andrelay module;Valid for 611/612/642/646 engine:  CDI control unit.	25
	Valid for petrol engines: Starter relay;Rear SAM control unit with fuse andrelay module;Valid for  engine 111/271/272:  ME-SFI control unit [ME];Valid for  112/113 engine: ME-SFI control unit [ME];87M1e circuit coupler sleeve.	15
54	Valid for engine 271.940: ME-SFI control unit [ME];Purge Control Valve (USA Version);Activated carbon tank shut-off valve  ;Valid for engine 271.942:  NOX (nitrogen oxides) control unit;Valid for 642/646 engine: CDI control unit;Valid for 642/646 engine: Circuit connector sleeve 30.	15
	Valid for 611/612 engines   : CDI control unit;Valid for engine 611/612 (until 11/30/04):Heating element for vent pipe.	7.5
55	Distronic steering angle sensor; DTR control unit;Valid for 722 exchange:ETC control unit [EGS] (until 31.5.04);Electronic control unit lever modulegear changes;Electrical Control Unit (VGS);Valid for 716 gearbox:Gear recognition switch;Automatic manual shift controlreducer.	7.5
56	ESP and BAS control unit; Brake light switch.	5
57	Steering angle sensor (up to 31.5.02);EIS control unit [EZS];Steering column module (from 1.6.02);Valid for 112/113 engine:ME-SFI control unit [ME].	5
58	Valid for 716 transmission:  SEQ hydraulic pump	40
59	ESP and BAS control unit	50
60	ESP and BAS control unit	40
61	Valid for 716 transmission:   Automatic manual transmission control unit	15
62	data link connector; light switch module;Stop light switch.	5
63	Light switch module	5
64	Radio;Radio and navigation units;Control and display unit icommand COMMAND.	10
65	Valid for 112/113 engine: Electric air pump.	40
relay
J	Horn relay
K	Relay terminal 87, frame
L	Wiper speed relay 1 and 2
M	Terminal relay 15R
N	SEQ Pump Control Relay [ASG](with automatic manual transmissionSequentronics (ASG)
O	Air pump relay (112, 113, 271 engines only)
P	Terminal relay 15
Q	Windshield wiper relay on and off
R	Relay 87, engine
S	Starter relay