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Info guides and mods

453 Fuses

Covers Fortwo & Forfour in all ICE engine and electric driver formats.

Modification Details




W453 (Forfour) & C453 (Fortwo)



Main Fuse Box F2




Fuse Number   Amp Rating Wire Colour
1 Centre SAM control unit 5A Brown
2 Power steering control unit 5A Brown
3 Lighting control unit 5A Brown
4 Airbag 5A Brown
5
6 Instrument cluster 10A Red
7 Horn, alarm system 15A Blue
8 Driver side SAM 10A Red
9 Driver side SAM 10A Red
10 Centre SAM 20A Yellow
11 Indicators 15A Blue
12 Centre SAM 10A Red
13 Centre SAM 15A Blue
14   30A Green
15 ESP 5A Brown
16 Interior lighting 10A Red
17 Immobiliser 3A Violet
18 Electric adjustable mirrors 5A Brown
19 Brake lights 10A Red
20 Parking aid, headlight adjusters, lane keep assist 15A Blue
21 ECU 5A Brown
22 Rear window wiper 15A Blue
23 Starter motor 30A Green
24 Central locking 40A Orange
25 Front windscreen wipers 30A Green
26 Radio 20A Yellow
27
28 12v socket, cigarette lighter 15A Blue
29 Power supply control unit 5A Brown
30 Horn 15A Blue
31 Additional instruments 10A Red
32 Central locking 15A Blue
33 Rear lights, hazard warning button, central locking button, headlamp adjusters, power windows, licence plate lights, radio, AC controller, cruise control, speed limiter, parking aid button, program selector button, tailgate unlocking, lane keeping assist camera, start/stop button. 25A Light blue
34 Headlights, DRL 25A Light blue
35 Headlights, DRL 25A Light blue
36
37
38
39 Roof rack electrical connection 20A Yellow
40
41
42 Seat heater control unit 25A Light Blue
43 Heated wing mirrors and adjusters 5A Brown
44 Anti-entrapment feature (emergency windows) 25A Light blue
45 Gearbox control unit 5A Brown
46 Radio amplifier 20A Yellow
47
48 Brake booster pump & Power electronics
(electric drive)
49 Electric vehicle circuit 30 (electric drive) 10A Red
50
51
52 Soft top control drive unit 20A Yellow
53 Soft top control drive unit 20A Yellow

Front Fuse Box (Under Bonnet) F1


Petrol Engine

Item Function Specification
Fuse 1 Heated Rear Window 30A
Fuse 2 Seat Heater 30A
Fuse 3 ESP Traction Control 25A
Fuse 4 Fortwo Main Electrical 40A
Fuse 5 Combustion Engine & Relay Module F11 60A
Fuse 6 Twinamic Auto Gearbox 50A
Fuse 7 Heating/AC System 30A
Fuse 8 Unknown 80A
Fuse 9 Secondary Air Injection Pump (USA) 60A

Electric Drive

Item Function Specification
Fuse 1 Heated Rear Window 30A
Fuse 2 Brake Booster Vacuum Pump Controller 30A
Fuse 3 ESP Traction Control 25A
Fuse 4 Fortwo Main Electrical 25A
Fuse 4 Forfour Sliding Roof 40A
Fuse 5 Power For Rear Fuse Box F11 25A
Fuse 6 Power For Internal Fuse Box F2 70A
Fuse 7 Fan Motor 40A
Fuse 8 Spare
Fuse 9 Battery Heater 60A


Rear Fuse Box (Behind Offside Boot Panel) F11



Petrol Engine

Fuse Number Function Specification
1 AC Compressor Clutch Diode
2 Vacuum Pump Relay Diode
3 Fuel Pump Level Sensor 20A
4 Circuit 30 25A
5 Circuit 87 15A
6 Air Conditioning 15A
7 Fan 10A
8 Twinamic Dual Clutch 10A

Electric Drive

Fuse Number Function Specification
1 Spare
2 Transmission Mode Sensor 15A
3 Electric Dive Motor Fan 40A
4 Battery Coolant Pump Relay 30A
5 Battery Coolant Pump 15A
6 Battery Management System 5A
7 Electronics Control Unit 20A
8 Circuit 87 15A

Battery Clamp Fuses (Positive Battery Connection) F108



Fuse Number Function Specification
1 Feeds Fuse 3A & 3B And Main Cable To Front Fuse Box F1 200 Amp
2A Main Fuse Box F2 70 Amp
2B Power Steering Controller 60 Amp
3A Main Fuse Box F2 & Ignition Lock 70 Amp
3B ESP Traction Control Unit 50 Amp

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