Mercedes-Benz B-Class (W245; 2006-2011) fuses and relays

 

In this article, we consider the first-generation Mercedes-Benz B-Class (W245), produced from 2005 to 2011. Here you will find fuse box diagrams of Mercedes-Benz B160, B170, B180, B200 2006, 2007, 2008, 2009, 2010 and 2011, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

See other Mercedes-Benz B-Class:

Fuse Layout Mercedes-Benz B-Class 2006-2011


Cigar lighter (power outlet) fuses in the Mercedes-Benz B-Class are the fuses #38 (Front cigar lighter) and #53 (Rear cigar lighter, Interior socket) 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 (or near the driver’s seat on RHD).
Remove the floor panel, cover, and soundproofing.The location of the fuses in the passenger compartment: Mercedes-Benz B-Class (2006-2011)

Fuse box diagram

Interior fuse box diagram: Mercedes-Benz B-Class (2006-2011)

 

Assignment of the fuses in the passenger compartment

Fused function Amp
1 2006-2008: Stop light switch 10
1 Light and vision package (2006-2008): Stop light switch

2009-2011: Stop light switch

5
2 Heated rear window 25
3 Instrument cluster EIS [EZS] control unit 7.5
4 EIS [EZS] control unit
Electric steering lock control unit
15
5 Automatic air conditioning and Comfort automatic air conditioning: HEAT control and operating unit

Automatic air conditioning: AAC [KLA] control and operating unit

Comfort automatic air conditioning: Comfort AAC [KLA] control and operating unit

7.5
6 Left fanfare horn
Right fanfare horn
15
7 Fuel pump relay 25
8 Overhead control panel control unit 25
9 ESP and BAS control unit 40
10 Blower regulator/interior wiring harness connector 40
11 Valid for engine 266: Circuit 87 relay, engine 30
11 Valid for engine 640: Circuit 87 relay, engine 40
12 Steering column module
Multifunction steering wheel (2006-2008)
5
13 Left front door control unit 25
14 Right front door control unit 25
15 ESP and BAS control unit 25
16 Data link connector
Parktronic system (PTS) control unit (2006-2008)
10
17 Rotary light switch 5
18 Valid for transmission 711, 716: Backup lamp switch 7.5
19 Micromechanical turn rate sensor AY pickup 5
20 Restraint systems control unit 7.5
21 Starter relay 30
22 Instrument cluster 7.5
23 2006-2008: Washer nozzle heating 7.5
23 Valid for engine 640 as of 1.9.08: Fuel filter condensation sensor with heating element 20
24 Electric power steering (ES) control unit 7.5
25 Stop light switch
ESp and BAS control unit
7.5
26 Valid for transmission 722: Electronic selector lever module control unit 7.5
27 Valid for transmission 722:  CVT (continuously variable automatic transmission) control unit  10
28 Rotary light switch 5
29 SAM control unit 30
30 Circuit 87F relay 25
31 2006-2008: Central gateway control unit (vehicles up to 30.11.05), Rotary light switch
2009-2011: Automatic light switch daylight sensor, Rain/light sensor
5
32 Valid for engine 266: ME-SFI [ME] control unit 7.5
33 Radio Radio and navigation unit COMAND operating, display and control unit (Japan) 15
34 Left rear door control unit 25
35 Right rear door control unit 25
36 2006-2008:
Cell phone separation point
Trailer control unit
7.5
36 2009-2011:
Trailer control unit
PTS control unit
10
37 Restraint systems control unit
Front passenger seat occupied recognition sensor
Front passenger seat occupied and child seat recognition sensor
7.5
38 Front cigar lighter with ashtray illumination 25
39 Wiper motor 25
40 Louvered sunroof: Overhead control panel control unit 7.5
40 Lamella roof: Overhead control panel control unit 25
41 Liftgate wiper motor 15
42 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)
7.5
43 Valid for engine 266:
Terminal 87M1e connector sleeve
Bivalent natural gas drive (2009-2011):
Terminal 87M1e connector sleeve
15
43 Valid for engine 640:
Terminal 87M1e connector sleeve
7.5
44 Valid for engine 266:
Terminal 87M2e connector sleeve
15
44 Valid for engine 640:
Terminal 87M2e connector sleeve
20
45 Valid for engine 640:
CDI control unit
25
46 2006-2008:
Telephone control unit, (Japan)
E-net compensator
Universal Portable CTeL Interface (UPCI [UHI]) control unit
7.5
46 2009-2011: Bass module speaker (Japan) 25
46 2009-2011: Amplifier for sound system 40
47 Telephone control unit, (Japan)
Universal Portable CTEL Interface (UPCI [UHI]) control unit
Cell phone separation point
Voice control system (VCS [SBS]) control unit
7.5
48 ATA [EDW]/tow-away protection/interior protection control unit
Alarm signal horn with additional battery
7.5
49 Upper control panel control unit
Left front seat heated cushion (2006-2008)
Left front backrest heated cushion (2006-2008)
Right front seat cushion heater element (2006-2008)
Right front backrest seat cushion heater element (2006-2008)
25
50 2006-2008:
CD changer
VICS+ETC voltage supply separation point (Japan)
2009-2011:
Media interface control unit
Digital TV tuner
Digital Audio Broadcasting control unit
7.5
50 Valid for government vehicles (2009-2011):
Roof light bar
Circuit 30 connector sleeve
30
51 Canada (2009-2011): Weight Sensing System (WSS) control unit
Valid for government vehicles (2009-2011): Special signal system control panel
10
52 VICS+ETC voltage supply separation point (Japan) (vehicles up to 31.5.06) 5
52 Spare (vehicles as of 1.6.06) 7.5
52 Emergency call system control unit (USA) (vehicles up to 31.5.06) 7.5
53 Rear cigar lighter with ashtray illumination
Interior socket
30
54 Amplifier for sound system
Bass module speaker
25
54 Valid for government vehicles (2009-2011): 2-pin 12V socket 15
55 Left front lamp unit (Bi-xenon)
Right front lamp unit (Bi-xenon)
7.5
55 Left front lamp unit (Hi-xenon) 10
56 Spare 10
56 Right front lamp unit (Hi-xenon) 10
57 2009-2011: Trailer hitch socket (13-pin) 15
57 2006-2008: Audio gateway control unit (Japan) 25
57 2006-2008:
SDAR control unit
Emergency call system control unit (USA)
7.5
58 Trailer control unit 25
59 Trailer control unit (vehicles up to 31.5.05)
Trailer hitch socket (13-pin) (vehicles as of 1.6.05)
20
60 Driver seat connector block 20
61 Front passenger seat connector block 20
62 Circuit 15 relay (2) (SA: xenon, cell phone) 25
63 Spare (vehicles up to 31.5.05)
63 Valid for government vehicles (2009-2011): Roof light bar 25
63 Emergency call system control unit (USA) (vehicles as of 1.6.05)
SDAR control unit (vehicles as of 1.6.05)
7.5
64 Valid for engine 266: Air pump relay 40
64 Valid for engine 640: Engine wiring harness/engine compartment connector (2006-2008), Glow time output stage (2009-2011) 80
65 Electric power steering (ES) control unit 80
66 SAM control unit 60
67 Circuit 15R relay (2) (SE) 50
68 Valid for engine 266.920 and engine 266.940 with transmission 722: AAC with integrated control additional fan motor 50
68 Valid for engine 640.940, 640.941, 266.960, 266.980 and for engine 266.920, 266.940 with (Trailer hitch): AAC with integrated control additional fan motor 60
69 Circuit 15R relay (1) 50
70 Circuit 15 relay (1) 60
71 Valid for engine 640: PTC heater booster 150
72 2006-2008: Circuit 30 connector sleeve
2009-2011:
Special vehicle multifunction control unit (SVMCU [MSS]) (Taxi)
Valid for government vehicles:
Fuse 7
Fuse 10
60

Relay Panel (K100)

Relay Panel (K100) location: Mercedes-Benz B-Class (2006-2011)

Relay Panel (K100): Mercedes-Benz B-Class (2006-2011)

Relay Panel (K100)

Fused function Amp
80 Reserved for special-purpose vehicles 30
81 Reserved for special-purpose vehicles 30
82 Reserved for special-purpose vehicles 30
83 Reserved for special-purpose vehicles 30
Relay
A Circuit 15R relay (2) (SA)
B Circuit 15R relay (1)
C Fanfare horn relay
D Heated rear window relay
E Wiper stage 1/2 relay
F Wiper ON/OFF relay
G Circuit 15 relay (1)
H Backup relay
I Valid for engine 266: Air pump relay
K Fuel pump relay
L Engine circuit 87 relay
M Starter relay
N Circuit 87F relay
O Circuit 15 relay (2) (SA: xenon, cell phone)


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