Fuses and relays Mercedes-Benz S-class (W220, 1998 - 2005)

The fourth generation Mercedes-Benz S-Class was unveiled at the 1998 Paris Motor Show. The creator of the model was Steve Mattin. In 2002, the car went through restyling. In this material, we will analyze in detail the fuse diagrams of the fourth generation Mercedes S-class (W220: S280, S320, S350, S430, S500, S600, S55 AMG, S63 AMG, S65 AMG, S320 CDI, S400 CDI) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 release.

Here you will find the locations and photos of the fuse blocks. Separately, we note the elements responsible for the cigarette lighter and fuel pump.

In the engine compartment

The main mounting block is located on the driver's side.

General view of the main unit.

Diagram
Models after 2002
Models up to 2002
No.	Relay description
R1	Wiper anti-icing relay
R2	Terminal 15 relay
R3	Terminal 15R relay
R4	steering column adjustment 1/2, horizontal
R5
R6	high pressure headlamp washer
R7	Wiper high / low relay
R8	wiper
R9	steering column adjustment 1/2, vertical
R10
No.	Fuse decoding	A
1	Wiper anti-icing relay	40
2	High pressure headlamp washer relay	50
3	Steering column adjustment, horizontal	15
4	Steering column adjustment, vertical	15
5	Wiper relay	40
6	Heater switch (up to 2002)	7.5
	Not used (after 2002)	-
7		-
8		-
9	Air suspension	30
	ADS control unit
	Body control unit
10	Windshield washer pump	15
11	Front cigarette lighter w220 (before 2002)	15
	Ashtray lighting (up to 2002)
	Not used (after 2002)	-
12	Automatic location recognition (up to 2002)	7.5
	Seat belt buckle warning light (up to 2002)	7.5
	Not used (after 2002)	-
13	Front left door control unit	40
14		-
15		-
16	Brake light switch	7.5
17		-
18	Telephone	5
	Emergency call system
19	Seat belt pretensioner (after 2002)	-
		5
20	Diagnostic connector (up to 2002)	5
	Instrument panel (before 2002) Not used (after 2002)	-
21	Instrument panel (before 2002) Not used (after 2002)	5
		-
22	Instrument panel (up to 2002)	5
	Audio system (after 2002)	15
	Radio remote display (after 2002)
23	Climate control (up to 2002)	10
	Air conditioning control unit (up to 2002)
	TV tuner (after 2002)
	CD changer (after 2002)
24	Diagnostic connector (up to 2002)	10
	Audio system (after 2002)	20
	Center console (after 2002)
25	Not used (before 2002) Audio amplifier (after 2002)	-
		25
26	Top control panel module (before 2002) Not used (after 2002)	10
27		-

Additional fuse box

An additional fuse and relay box is located on the passenger side.

General form. additional block.

Diagram
No.	Relay
R1	Relay, engine electronics
R2	Starter
R3	Engine control unit, diesel
	Or
	Air pump
R4	Air compressor relay
R5	horn relay
No.	Circuit breakers	A
1	horn	15
2	Relay, engine electronics	20
3		20
4	Secondary air pump relay	40
5	Air compressor relay	40
6	Heating system	40
7	Traction control unit until 2002	5
	Traction control unit after 2002	10
8	Heated steering wheel (after 2002)	15
	No (until 2002)
9	Daylight system	7.5
10	Gearbox control unit / Automatic transmission shift lever	15
11	Opening the luggage compartment	5
12	Door control unit, front right	40
13	Xenon lamps	10
	Headlight adjustment
14	Additional heater	20
15	Relay, additional air unit	20
16	Engine Control Unit, Diesel / Starter Relay	25
17	Engine control unit, diesel / intake manifold heater	7.5
18		-
19	Body Control Unit / ADS Control Unit / Air Suspension	5
20	Relay, auxiliary air unit / A / C control unit / Fan control	10
21	Cooling fan control unit or not used (before 2002)	7.5
	No (after 2002)	-
22	Ignition coils and capacitor	15

Additional block #2 (only cars after 2002)

Cars after 2002 are equipped with another engine compartment fuse block.

Additional block diagram (Mercedes W220 after 2002 onwards)
No.	Decryption	A
R1	Motronic system
R2	Charge air relay
R3	Relay of the fuel module in the tank (fuel pump relay) or Empty
1	Motronic system	20
2	Motronic system	20
3	Not
4	Charge air relay	10
5	Not

In the passenger compartment

Fuse box #1 is located under the rear passenger seat.

First block

Assigment of fuses in #1 block under the seat

Diagram
No.	Description
R1	Rear window blind relay
R2	Slip sensor relay
R3	Terminal 15 relay
R4	Additional relay, fuel pump
R5	Heated rear window relay
No.	Description	A
1	Rear window blind relay	10
2	Slip sensor	5
3	Additional relay, fuel module (fuse for Mercedes w220 fuel pump)	30
4	Heated rear window relay	50
5	Trailer control unit	10
6	Trailer connector	25
7	Trailer control unit	30
8	Closing the luggage compartment	25
	Luggage compartment release relay
9	Keyless go control unit	7.5
10	Control unit (for taxi)	30
11		-
12	Voice control unit	15
	Handsfree phone
13	Pneumatic System Equipment (PSE)	20
14	Telephone	7.5
15	Multifunctional control unit	7.5
	Antenna amplifier
16		-
17	Sound amplifier	25
18	Power rear seats	25
19	Rear air conditioner	15
	Coolant circulation pump
20	Rear air conditioner	15
21	Tire pressure monitoring system control unit	10
22	Front left seat belt pretensioner	25
23	Door control unit, rear left	40
24	Front right seat belt pretensioner	25
25	Door control unit, rear right	40
26	Parktronic system	10
27	Refrigerator (in the back of the rear seat)	15
28	Top console (in the ceiling)	40

Second block

Fuse box #2 is located at the end of the dashboard on the passenger side, behind a protective cover.

Diagram
No.	Decryption	A
1	Steering column control unit	7.5
	The engine control unit
	EIS control unit
	Alarm
2	Dashboard	5
3	Top Control Panel Module	10
4	Diagnostic connector (DLC)	10
5	Climate control	10
	Air conditioner control unit
6	Center console	10
7	Diagnostic connector (DLC)	5
	Dashboard
8	Dashboard	5
9	Front cigarette lighter fuse	15
	Ashtray lighting