2004–2012 Mercedes A-Class (W169) Fuse Box Diagram

Fuse box in the front-passenger footwell

The fuse box is located in the front-passenger footwell in front of the seat.

  1. Remove the footmats.
  2. Turn retaining screw (2) anti-clockwise using a coin for example.
  3. Raise cover (1) and remove it.
  4. Remove the cover mat from the battery.
  1. Fuse allocation chart
  2. Fuse box
Fuses Specifications
No. A Description
1 10 Stop light switch
5
with Light and vision package: Stop light switch
2 25 Heated rear window
3 7.5 Instrument cluster
EIS [EZS] control unit
4 15 EIS [EZS] control unit
Electric steering lock control unit
5 7.5 HEAT control and operating unit
     or
Automatic air conditioning [KLA] control and operating unit
     or
Comfort automatic air conditioning [KLA] control and operating unit
6 15 Left fanfare horn
Right fanfare horn
7 25 Fuel pump relay
5
E-CELL: DC/DC converter control unit
8 25 Overhead control panel control unit
9 40 ESP and BAS control unit
10 40 Blower regulator/interior wiring harness connector
11 30
M266: Circuit 87 relay, engine
40
OM640:  Circuit 87 relay, engine
12 5 Steering column module
Multifunction steering wheel
13 25 Left front door control unit
14 25 Right front door control unit
15 25 ESP and BAS control unit
16 10 Data link connector
PTS control unit
17 5 Rotary light switch
18 7,5
Valid for transmission 711, 716:
   Backup lamp switch
7.5 E-CELL:
   A/C compressor control unit
   BKGN Energy monitoring control unit
   Vacuum pump 1 control unit
   Vacuum pump 2 control unit
19 5 Micromechanical turn rate sensor AY pickup
20 7.5 Restraint systems control unit
21 30 Starter relay
22 7.5 Instrument cluster
23 7.5 Washer nozzle heating
20
OM640 (01.09.2008→): Fuel filter condensation sensor with heating element
24 7.5 Electric power steering (ES) control unit
25 7.5 Stop light switch
ESp and BAS control unit
26 7.5
Valid for transmission 722:
   Electronic selector lever module control unit
27 10
Valid for transmission 722:
   CVT (continuously variable automatic transmission) control unit
28 5 Rotary light switch
29 30 SAM control unit
30 25 Circuit 87F relay
31 5 Central gateway control unit (vehicles up to 30.11.05)
Rotary light switch
Automatic light switch daylight sensor
Rain/light sensor
32 7.5
M266: ME-SFI [ME] control unit
7.5 E-CELL: Energy monitoring control unit
33 15 Radio
Radio and navigation unit
COMAND operating, display and control unit (Japan)
34 25 Left rear door control unit
35 25 Right rear door control unit
36 7.5 Cell phone separation point
Trailer control unit
10 Trailer control unit
PTS control unit
37 7.5 Restraint systems control unit
Front passenger seat occupied recognition sensor
Front passenger seat occupied and child seat recognition sensor
38 25
Front cigar lighter with ashtray illumination
39 25 Wiper motor
40 7.5 Overhead control panel control unit
25 Roof motor
41 15 Liftgate wiper motor
42 7.5 Glove compartment illumination with switch
Left and right vanity mirrors illumination
Footwell illumination switch (driving school package)
Pedal operation monitor switch (driving school package)
VICS+ETC voltage supply separation point (Japan)
43 15 M266: Terminal 87M1 e connector sleeve
7.5 OM640: Terminal 87M1e connector sleeve
20 E-CELL: Vacuum pump 1 control unit
44 15 M266: Terminal 87M2e connector sleeve
20 OM640: Terminal 87M2e connector sleeve
45 25 OM640: CDI control unit
25 E-CELL: Vacuum pump 2 control unit
46 7.5 Telephone control unit, (Japan)
E-net compensator
Universal Portable CTeL Interface (UPCI [UHI]) control unit
25 Bass module speaker (Japan)
40 Amplifier for sound system
5
E-CELL: Charging control unit
47 7.5 Telephone control unit (Japan)
Universal Portable CTEL Interface (UPCI [UHI]) control unit
Cell phone separation point
Voice control system (VCS [SBS]) control unit
E-CELL: Charger 1
48 7.5 ATA [EDW]/tow-away protection/interior protection control unit
Alarm signal horn with additional battery
E-CELL: Charger 2
49 25 Upper control panel control unit
Left front seat heated cushion
Left front backrest heated cushion
Right front seat cushion heater element
Right front backrest seat cushion heater element
50 7.5 CD changer
Media interface control unit
Digital TV tuner
Digital Audio Broadcasting control unit
VICS+ETC voltage supply separation point (Japan)
30 Government vehicles:
   Roof light bar
   Circuit 30 connector sleeve
51 10 E-CELL:
   Cooling fan
   Low temperature coolant pump
52 5 VICS+ETC voltage supply separation point (Japan) (vehicles up to 31.5.06)
E-CELL: Electric drive control unit
7.5 Spare (vehicles as of 1.6.06)
7.5 Emergency call system control unit (USA) (vehicles up to 31.5.06)
53 30
Rear cigar lighter with ashtray illumination
Interior socket
54 25 Amplifier for sound system
Bass module speaker
5
E-CELL: Electric drive control unit
55 7.5 Left front lamp unit (Bi-xenon)
Right front lamp unit (Bi-xenon)
10 Left front lamp unit (Hi-xenon)
56 10 Spare
10 Right front lamp unit (Hi-xenon)
57 15 01.06.2005→: Trailer hitch socket (13-pin)
25 →31.05.2005: Audio gateway control unit (Japan)
7.5 SDAR control unit
Emergency call system control unit (USA)
58 25 Trailer control unit
25 E-CELL: Vehicle gateway control unit
59 20 →31.05.2005: Trailer control unit
20 01.06.2005→: Trailer hitch socket (13-pin)
5
E-CELL: Battery management system control unit 1
60 20 Driver seat connector block
61 20 Front passenger seat connector block
62 25 Circuit 15 relay (2) (SA: xenon, cell phone)
63 25 01.06.2005→: Audio gateway control unit (Japan) 
Valid for government vehicles: Roof light bar
7.5 Emergency call system control unit (USA) (01.06.2005→)
SDAR control unit
5 E-CELL: Battery management system control unit 2
64 40 M266: Air pump relay
80 OM640:
   Engine wiring harness/engine compartment connector
   Glow time output stage
65 80 Electric power steering (ES) control unit
66 60 SAM control unit
67 50 Circuit 15R relay (2) (SE)
68 50 M266.920 and M266.940 with transmission 722: AAC with integrated control additional fan motor
60 OM640.940, OM640.941, M266.960, M266.980 and M266.920, M266.940 with Trailer hitch: AAC with integrated control additional fan motor
69 50 Circuit 15R relay (1)
70 60 Circuit 15 relay (1)
71 150
OM640: PTC heater booster
72 60 Circuit 30 connector sleeve
Special vehicle multifunction control unit (SVMCU [MSS]) (Taxi)

Petrol:

Diesel:

Fuses Specifications
No. A Description
80 30 Reserved for special-purpose vehicles
81 30 Reserved for special-purpose vehicles
82 30 Reserved for special-purpose vehicles
83 30 Reserved for special-purpose vehicles
Relay
A Circuit 15R (2) (SA)
B Circuit 15R (1)
C Fanfare horn 
D Heated rear window 
E Wiper stage 1/2 
F Wiper ON/OFF 
G Circuit 15 (1)
H Backup 
I Air pump 
K Fuel pump 
L Engine circuit 87
M Starter
N Circuit 87F
O Circuit 15 (2) (SA: xenon, cell phone)