Mercedes-Benz A-Class (W168; 1997-2004) fuses and relays


In this article, we consider the first-generation Mercedes-Benz A-Class (W168), produced from 1997 to 2004. Here you will find fuse box diagrams of Mercedes-Benz A140, A160, A170, A190, A210 1997, 1998, 1999, 2000, 2001, 2002, 2003 and 2004, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Mercedes-Benz A-Class 1997-2004


Cigar lighter (power outlet) fuse in the Mercedes-Benz A-Class is the fuse #12 (Cigarette lighter, 12V socket in trunk) in the Passenger Compartment fuse box.

Passenger Compartment Fuse Box

Fuse box location

The fuse box is located under the floor near the passenger seat (remove the floor panel, cover, and soundproofing).The location of the fuses in the passenger compartment: Mercedes-Benz A-Class (W168; 1997-2004)

Fuse box diagram

Interior fuse box diagram: Mercedes-Benz A-Class (1997-2004)


Assignment of the fuses and relay in the passenger compartment

Fused function Amp
1 Gasoline engine: Control module, ISC (Idle speed control), AGR-Ventil, Lambda heater 1, Lambda heater 2, Diagnostic socket, Cruise control, Secondary air injection relay, Secondary air injection valve, Shut-off valve 20
1 Diesel engine: Diesel control module, Wastegate actuator, Throttle valve switchover valve, Exhaust gas recirculation pressure valve, Three-way catalytic converter temperature sensor 10
2 Gasoline/diesel engine control module, Ignition coils, Injection valves, FP relay module (coil), Electronic accelerator, Starter lockout relay 25
3 Electric fan (engine cooling), Electric fan (engine cooling) with air conditioning 30
4 Engine control module 7.5
5 Automatic clutch 40
6 FP relay module (gasoline) 30
7 Light module 40
8 Starter relay 30
9 Wiper motor 40
10 Rear wiper 20
10 Laminated roof 40
11 Combination switch (Wiper control, Headlamp flasher, Windshield washer pump (actuation)), RNS (Radio Navigations System) 15
12 Cigarette lighter, Glovebox illumination, Radio, CD changer, 12V socket in trunk 30
13 Front left power window or power window with excess force limiter Front right power window 30
14 Instrument cluster (time functions), Wipe/wash pump relay, Mobile phone 15
15 Airbag control module, ACSR sensor (automatic child seat recognition), Side airbag sensor, Side airbag sensor 10
16 Exterior rearview mirror adjustment, Exterior rearview mirror heater, Parktronic 15
17 Fanfare horn 15
18 Instrument cluster, Transponder and RFL (radio frequency locking), Motor electronics relay, Fan relay 10
19 Trailer coupling 25
20 Trailer coupling 15
21 Trailer coupling 15
22 Sound system 25
23 Make UP mirror illumination 7.5
24 Not assigned
25 Not assigned
26 Not assigned
27 Not assigned
28 Instrument cluster, last Instrument cluster, last Excess force limiter control module (excess force limiter) 10
29 Central locking, Seat installation recognition unit 15
30 DAS transponder (drive authorization system) and RFL (radio frequency locking), Electric instrument cluster 7.5
31 Rear window defroster 25
32 Portable phone, Radio or RNS (Radio Navigations System), CD changer, Front dome lamp, Rear dome lamp 15
33 Front left power window, Front right power window 30
34 Heater booster/freeze protection (diesel) 30
35 ATA control module 2x light relay, Siren 10
36 Front heated seats 25
37 VGS program selector lever (fully integrated transmission control), Heater booster coolant circulation pump (diesel) 10
38 Air conditioning control module (A/C compressor), Blend air recirculation flap stepper motor, Interior sensor blower, Heated windshield washer nozzle 10
39 Light module, Backup lamp, manual transmission/ automatic clutch, VGS backup lamp (fully integrated transmission control) 7.5
40 Stop lamp, left, right and center (ABS brake signal), Steering angle sensor 10
41 Air conditioning control module, Diagnostic socket 10
42 Rear left power window, Rear right power window 30
43 ESP (Electronic stability program), Brake switch, NC contact 15
44 VGS control module (fully integrated transmission control) or automatic clutch 10
45 Interior blower or air conditioning interior blower 30
46 Central protection by fuses 80
47 Power steering pump 60
48 Diesel engine: Preglow control module 60
48 Gasoline engine: Secondary air injection (AIR) 30
R1 Engine control (EC) relay
R2 Fuel pump relay
R3 ESP relay/TCM relay
R4 Heated rear window relay

Light Control Fuses (in the instrument panel)

They are located in the side of the instrument panel on the driver’s side.Instrument panel fuse box location: Mercedes-Benz A-Class (1997-2004)

Instrument panel fuse box diagram: Mercedes-Benz A-Class (1997-2004)

Light Control Fuses

Fused function Amp
1 Left low beam 7.5
2 Right low beam 7.5
3 Left main beam
Right main beam
Main beam indicator lamp (instrument cluster)
4 Left side lamp
Left tail lamp
5 Right side lamp
Right tail lamp
58K instrument cluster
License plate lamps
6 Left/right fog lamp
Left rear fog lamp

Engine Compartment Relay Box

Relay Box location: Mercedes-Benz A-Class (1997-2004)

Relay Box Diagram: Mercedes-Benz A-Class (1997-2004)

Engine Compartment Relay Box

1 Windscreen washer pump relay
2 Horn relay
3 Stop lamps inhibit relay
4 Starter motor inhibit relay
5 Engine coolant blower motor relay
6 ABS/ESP pump motor relay
7 Secondary air injection (AIR) pump relay (petrol)

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