Fuse box diagram — MERCEDES-BENZ A (2005 onwards)
Other generations: 1998–2005
Type what stopped working — headlight, wipers, lighter — and see which position powers it, and at how many amps.
2005 172 fuses
14 relays 3 boxes
Fuse box 1 · 1
84
5A
1
Brake light switch
5A
1
(10A also used)
25A
2
Heated rear windscreen
7.5A
3
Instrument panel
15A
4
Steering column lock control unit
7.5A
5
Heating and air conditioning
15A
6
Horn
25A
7
Fuel pump relay
25A
8
Overhead console
40A
9
ESP control unit, ABS control unit
40A
10
Blower or connector
30A
11
Terminal 87 relay, engine
5A
12
Steering column control unit
5A
12
Steering wheel controls
25A
13
Door control unit, front left
25A
14
Door control unit, front right
25A
15
ESP control unit, ABS control unit
10A
16
Data link connector
10A
16
Parktronic system
5A
17
Exterior lights switch
7.5A
18
Reversing light(s) switch
5A
19
Pick-up sensor
7.5A
20
Restraint control module (RCM)
30A
21
Starter relay
7.5A
22
Instrument panel
7.5A
23
Heated washer jets
7.5A
24
Power steering control unit
7.5A
25
Brake light switch
7.5A
25
ABS control unit
7.5A
25
ESP control unit
7.5A
26
CVT control unit
10A
27
CVT control unit
5A
28
Exterior lights switch
30A
29
Control unit
25A
30
Terminal 87 relay
5A
31
Central control unit
5A
31
Exterior lights switch
7.5A
32
Engine control unit
15A
33
Radio
15A
33
Navigation display
15A
33
Navigation system
25A
34
Door control unit, rear left
25A
35
Door control unit, rear right
7.5A
36
Telephone
7.5A
36
Trailer control unit
7.5A
37
Automatic seat occupied recognition
7.5A
37
Restraint Control Module (RCM)
25A
38
Cigarette lighter, front
25A
38
Ashtray illumination
25A
39
Wiper motor
7.5A
40a
Overhead console
25A
40b
Sunroof motor
15A
41
Wiper motor, rear
7.5A
42
Glovebox illumination
7.5A
42
Sun visor mirror(s)
15A
43
Terminal 87
15A
44
Terminal 87 M2e
?
45
Not used
7.5A
46
Telephone
7.5A
47
Telephone
7.5A
48
Alarm system
25A
49
Heated front seats
7.5A
50
CD changer
7.5A
50
Traction control
7.5A
50
Power supply
7.5A
51
Not used
5A
52
Traction control
5A
52
Power supply
30A
53
Cigarette lighter, rear
30A
53
Ashtray light
30A
53
12V socket in luggage compartment
25A
54
Amplifier subwoofer
7.5A
55
Xenon lights
7.5A
56
Not used
25A
57a
Audio unit
15A
57b
Trailer connector socket
25A
58
Trailer control unit
20A
59
Trailer control unit
20A
59
Or
20A
59
Trailer connector socket
20A
60
Driver's seat control unit
20A
61
Passenger's seat control unit
25A
62
Terminal 15 relay
25A
63
Audio unit
Fuse box 2
18
30A
1
Special vehicles
30A
2
Special vehicles
30A
3
Special vehicles
30A
4
Special vehicles
relay
R1
Terminal 15R relay 2
relay
R2
Terminal 15R relay 1
relay
R3
Horn relay
relay
R4
Heated rear windscreen relay
relay
R5
Wiper relay
relay
R6
Wiper relay
relay
R7
Terminal 15 relay
relay
R8
Reversing light(s) relay
relay
R9
Air pump relay
relay
R10
Fuel pump relay
relay
R11
Terminal 87 relay
relay
R12
Starter relay
relay
R13
Terminal 87 relay
relay
R14
Terminal 15 relay
Fuse box 1 · 2
84
5A
1
Brake light switch
5A
1
(10A also used)
25A
2
Heated rear windscreen
7.5A
3
Instrument panel
15A
4
Steering column lock control unit
7.5A
5
Heating and air conditioning
15A
6
Horn
25A
7
Fuel pump relay
25A
8
Overhead console
40A
9
ESP control unit, ABS control unit
40A
10
Blower or connector
40A
11
Terminal 87 relay, engine
5A
12
Steering column control unit
5A
12
Steering wheel controls
25A
13
Door control unit, front left
25A
14
Door control unit, front right
25A
15
ESP control unit, ABS control unit
10A
16
Data link connector
10A
16
Parktronic system
5A
17
Exterior lights switch
7.5A
18
Reversing light(s) switch
5A
19
Pick-up sensor
7.5A
20
Restraint control module (RCM)
30A
21
Starter relay
7.5A
22
Instrument panel
7.5A
23
Heated washer jets
7.5A
24
Power steering control unit
7.5A
25
Brake light switch
7.5A
25
ABS control unit
7.5A
25
ESP control unit
7.5A
26
CVT control unit
10A
27
CVT control unit
5A
28
Exterior lights switch
30A
29
Control unit
25A
30
Terminal 87 relay
5A
31
Central control unit
5A
31
Exterior lights switch
?
32
Not used
15A
33
Radio
15A
33
Navigation display
15A
33
Navigation system
25A
34
Door control unit, rear left
25A
35
Door control unit, rear right
7.5A
36
Telephone
7.5A
36
Trailer control unit
7.5A
37
Automatic seat occupied recognition
7.5A
37
Restraint Control Module (RCM)
25A
38
Cigarette lighter, front
25A
38
Ashtray illumination
25A
39
Wiper motor
7.5A
40a
Overhead console
25A
40b
Sunroof motor
15A
41
Wiper motor, rear
7.5A
42
Glovebox illumination
7.5A
42
Sun visor mirror(s)
7.5A
43
Terminal 87
20A
44
Terminal 87 M2e
25A
45
Engine control unit
7.5A
46
Telephone
7.5A
47
Telephone
7.5A
48
Alarm system
25A
49
Heated front seats
7.5A
50
CD changer
7.5A
50
Traction control
7.5A
50
Power supply
7.5A
51
Spare
5A
52
Traction control
5A
52
Power supply
30A
53
Cigarette lighter, rear
30A
53
Ashtray light
30A
53
12V socket in luggage compartment
25A
54
Amplifier subwoofer
7.5A
55
Xenon lights
7.5A
56
Spare
25A
57a
Audio unit
15A
57b
Trailer connector socket
25A
58
Trailer control unit
20A
59
Trailer control unit
20A
59
Or
20A
59
Trailer connector socket
20A
60
Driver's seat control unit
20A
61
Passenger's seat control unit
25A
62
Terminal 15 relay
25A
63
Audio unit
No position matches. Try one word — “headlight”, “pump”, “window”.
Fuse colours follow the blade-fuse standard (DIN 72581-3 / SAE J1284) and are derived from the rating. The number is what counts — older torpedo fuses use a different colour scheme. Cross-check the lid of the box.
Repair procedures for MERCEDES-BENZ
Step-by-step procedures from the workshop database, for this model.
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- Mercedes-Benz 640.9 W169, 245 2.0 CDI timing chain replacement
- Mercedes-Benz CL, W203 9 2.1 CDI timing chain replacement
- Mercedes-Benz W639 2.1 CDI timing chain replacement
- Mercedes-Benz 646.8 W204 11 2.1 CDI timing chain replacement
Fuse keeps blowing?
A blown fuse is a symptom, not the cause. Tell TorqFix which position it is and what the car does.
Ask about my car →Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Check the year and the label on the box in your car before pulling a fuse.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.