2006-2012 Mercedes-Benz R-Class (W251) Fuse Box Diagram

Location

F3 - Cockpit fuse box
F4 - Load compartment fuse and relay
F32 - Front prefuse
F33 - Battery compartment prefuse box box
F58 - Engine compartment fuse and relay

Fuse Box in Luggage Compartment

Opening:
   Open the cargo compartment.
   Lift the cargo compartment cover.
   Secure cargo compartment cover with securing hook.
   Fold cover 1 to the left as indicated by the arrow.
Closing:
   Install cover 1 in reverse order.

→31.05.2006

01.06.2006→

Fuses Specifications
No. A Description
20 5 Interference suppression filter for radio antenna
Microphone array control unit (→2008; except Japan)
Voice control system (VCS [SBS]) control unit (→2008; USA)
21 5 RCP [HBF] control unit
22 5 Parktronic system (PTS) control unit
Stationary heater (STH) radio remote control receiver (2009→)
23 10 DVD player (rear entertainment system)
E-net compensator
Rear audio control unit (→2008)
Portable CTEL separation point (→2008; Japan)
Universal Portable CTEL Interface (UPCI [UHI]) control unit (→2008; Japan)
COMAND operating, display and controller unit (2009→)
24 40 Right front reversible emergency tensioning retractor
25 15 →2008:
   Radio (except USA and Japan)
   Radio and navigation unit (except USA and Japan)
   COMAND operating, display and controller unit
20 2009→:
   Radio
   Radio and navigation unit
   COMAND operating, display and controller unit
26 25 Right front door control unit
27 30 Front passenger seat adjustment comfort relay (→2008)
Passenger-side front seat adjustment control unit with memory
28 30 Driver seat adjustment comfort relay (→2008)
Driver-side front seat adjustment control unit, with memory
29 40 Left front reversible emergency tensioning retractor
30 40 →2008:
   M156:
      Left fuel pump control unit
      Right fuel pump control unit
2009→: Fuel system control unit
31 10 HS [SIH], seat ventilation and steering wheel heater control unit
32 15 AIRmatic with ADS control unit
Rear axle level control system control unit
33 25 Keyless Go control unit
34 25 Left front door control unit
35 30 Amplifier for sound system
Subwoofer amplifier (2009→)
36 5 →2008: Emergency call system control unit
10 →2008:
   Japan:
      VICS+ETC voltage supply separation point
2009→: Emergency call system control unit
37 5 Backup camera voltage supply module (01.06.2006→, except USA and Japan)
Backup camera control unit (01.06.2006→, Japan)
38 10 Audio gateway control unit (→2008; Japan)
Digital TV tuner
TV combination tuner (analog/digital)
39 7.5 →2008:
   SDAR control unit (USA)
   Tire pressure monitor (TPM) [RDK] control unit
2009→:
   Tire pressure monitor (TPM) [RDK] control unit
   High definition tuner control unit
   Digital Audio Broadcasting control unit
   External navigation separating point (South Korea)
40 40 →2008: Rear-end door closing control unit
30 2009→: Rear-end door closing control unit
41 25 Overhead control panel control unit
42 25 Overhead control panel control unit
43 20 →31.05.2006:
   Tailgate wiper motor
   Left 3rd seat row socket
   Right 3rd seat row socket
2009→:
   M272, M273, M276: Fuel system control unit
   OM642.872: Right fuel system control unit
44 20 →31.05.2006:
   Left 2nd seat row socket
   Right 2nd seat row socket
2009→:
   USA:
      Front interior socket
      115 V socket
45 20 →2008:
   Cargo area connector box
   →31.05.2006:
      Front interior socket
   01.06.2006→:
      Left 2nd seat row socket
      Right 2nd seat row socket
2009→:
   Right 2nd seat row socket
   Luggage compartment socket
46 15 Front cigar lighter with ashtray illumination
47 10 2009→:
   Valid for retrofit:
      Left front illuminated door sill molding
      Right front illuminated door sill molding
48 5 2009→:
   OM642.870: AdBlue® supply relay
49 30 Right antenna coil (→2008)
Heated rear window
50 10 →2008: Tailgate wiper motor
15 2009→: Tailgate wiper motor
51 5 Activated charcoal filter shutoff valve
52 5 →30.06.2009:  
   Left front reversible emergency tensioning retractor
   Right front reversible emergency tensioning retractor
53 5 AIRmatic with ADS control unit
Rear axle level control system control unit
→2008:
   M156:
      Left fuel pump control unit
      Right fuel pump control unit
2009→:
   M272, M273, M276: Fuel system control unit
   OM642.872: Right fuel system control unit
54 5 Front SAM control unit
Headlamp range adjustment control unit (bi-xenon headlamp unit)
55 7.5 Rotary light switch
Instrument cluster
56 5 →2008: Data link connector
2009→:
   OM642.870: AdBlue® control unit
57 20 →2008: Fuel pump with fuel gauge sensor
2009→:
   OM642.870: Fuel pump
58 7.5 Data link connector
Central gateway control unit
59 7.5 Driver NECK-PRO head restraint solenoid
Front passenger NECK-PRO head restraint solenoid
60 5 →2008:
   Glove compartment illumination with switch
   Rear SAM control unit
   Engine compartment fuse and relay box
   CTEL separation point
   VICS+ETC voltage supply separation point (Japan)
   Emergency call system control unit
2009→:
   Glove box illumination with switch
   Engine compartment fuse and relay box
   Rear SAM control unit)
   Cell phone separation point
   VICS+ETC power supply separating point (Japan)
   Multicontour seat pneumatic pump
   External navigation separating point (South Korea)
   Emergency call system control unit
   Rear bumper interior Blind Spot Monitoring electrical connector
61 10 Restraint systems control unit 
Right front seat contacting strip
62 30 Front passenger seat adjustment switch
Front passenger lumbar support regulator control unit
63 30 Driver seat adjustment switch
Driver lumbar support regulator control unit
64 - -
65 - -
66 30 2009→: Multicontour seat pneumatic pump
67 25 Rear air conditioning blower motor
68 25 →2008: Heated rear seats
2009→: Seat heater, seat ventilation and steering wheel heater control unit
69 30 -
70 20 Trailer hitch socket (13-pin)
Trailer hitch socket (7-pin) (USA)
71 30 USA: Electric brake control separation point
72 15 Trailer hitch socket (13-pin)
Relays
K →31.05.2006: Terminal 15R power outlet relay, with power-down
01.06.2006→: Relay, circuit 15R sockets (with power-down) (power supply of electric seat adjustment)
L Terminal 30X
M Heated rear window
N Circuit 15 relay / terminal 87FW
O Fuel pump
P Rear wiper
R Circuit R relay 15R
S Reserve 1 (changer) (power supply for front socket)
T 01.06.2006→: Reserve 2 (normally open contact) (power supply for center and rear sockets)
U 01.06.2006→: Trailer relay terminal 30
V 01.06.2006→: Spare relay 2

Gasoline:

Diesel:

Fuse Box in Passenger Compartment

Opening:
   Open the front passenger door.
   Pull cover (1) in direction of arrow.
Closing:
   Clip upper end of cover (1) into opening.
   Push on lower end of cover (1) until it engages.

Fuses Specifications
No. A Description
10 10 Booster blower electronic blower controller
11 5 Instrument cluster
12 15 Automatic air conditioning [KLA] control and operating unit
Comfort automatic air conditioning [KLA] control and operating unit
13 5 Upper control panel control unit
Steering column module
14 7.5 CD changer (→2008)
EZS control unit
15 5 Electronic compass
Media interface control unit (2009→)
16 - -
17 - -
18 - -

Fuse Box in Engine Compartment

Opening:
   Open the hood.
   With a dry cloth, remove any moisture from the fuse box (1).
   Pull clamp (1) in direction of arrow.
   Lift fuse box cover (2) up.
Closing:
   Make sure the sealing rubber is positioned properly.
   Press fuse box cover (2) down and secure with clamp (1).
   Close the hood after checking or replacing fuses.

Fuses Specifications
No. A Description
100 30 Wiper motor
101 15 →2008:
   AAC with integrated control additional fan motor
   M113, M272: Purge control valve
  M272:
      Radio interference suppression capacitor 1
      Radio interference suppression capacitor 2
      Cylinder 1 ignition coil
      Cylinder 2 ignition coil
      Cylinder 3 ignition coil
      Cylinder 4 ignition coil
      Cylinder 5 ignition coil
      Cylinder 6 ignition coil
   OM642:
      O2 sensor upstream of CAT
      CDI control unit
2009→:
   Engine and air conditioning electric suction fan with integrated control
   M272, M273:
      Purging switchover
      Circuit 87 M1e connector sleeve
   OM642:
      CDI control unit
      O2 sensor upstream of CAT
   OM642.870/872:
      O2 sensor upstream of CAT
102 15 →2008:
   OM642:
      Recirculation pump for transmission oil cooler
  M156:
      Engine coolant circulation pump
2009→:
   OM642, OM642.870 (→31.07.2010): 
      Transmission cooler circulation pump
   M276:
      Charge air cooler circulation pump
103 25 →2008:
   M113:
      ME-SFI [ME] control unit
      Cylinder 1 fuel injection valve
      Cylinder 2 fuel injection valve
      Cylinder 3 fuel injection valve
      Cylinder 4 fuel injection valve
      Cylinder 5 fuel injection valve
      Cylinder 6 fuel injection valve
      Cylinder 7 fuel injection valve
      Cylinder 8 fuel injection valve
    OM642:
      CDI control unit
2009→:
   OM642.950, OM642.870/872: CDI control unit
   M272: ME-SFI [ME] control unit
   M276:
      ME-SFI [ME] control unit
      Engine/engine compartment connector
104 15 →2008:
   M113:
      Left O2 sensor upstream TWC [KAT]
      Right oxygen O2 sensor upstream of catalytic converter
      Left O2 sensor downstream TWC [KAT]
      Right O2 sensor downstream TWC [KAT]
      Variable intake manifold switchover valve
      EGR vacuum transducer
      Air pump change-over valve
  M272:
      Heating system shutoff valve
      Intake manifold tumble flap switchover valve
      Air pump change-over valve
      Three-disk thermostat valve
      Pressure regulating on the valve power steering unit pump
   OM642:
      Left hot film mass air flow sensor
      Right hot film mass air flow sensor
      Intake port shutoff motor
      Glow time output stage
      Vent line heater element
      Power steering pump pressure regulator valve
      Left exhaust gas recirculation positioner
      Boost pressure positioner
2009→:
   M272, M273: Connector sleeve, circuit 87 M2e
   OM642.950: Circuit 87 connector sleeve
   OM642.870/872: Circuit 87D2 connector sleeve
105 15 →2008:
   M113:
      ME control unit
      Radio interference suppression capacitor 1
      Radio interference suppression capacitor 2
      Cylinder 1 ignition coil
      Cylinder 2 ignition coil
      Cylinder 3 ignition coil
      Cylinder 4 ignition coil
      Cylinder 5 ignition coil
      Cylinder 6 ignition coil
      Cylinder 7 ignition coil
      Cylinder 8 ignition coil
   M272:
      ME control unit
      Hot film mass air flow sensor
      Hall sensor for left inlet camshaft
      Right intake camshaft Hall sensor
      Left exhaust camshaft Hall sensor
      Right exhaust camshaft Hall sensor
      Left intake camshaft solenoid
      Right camshaft intake solenoid
      Left exhaust camshaft solenoid
      Right exhaust camshaft solenoid
      Cylinder 1 fuel injection valve
      Cylinder 2 fuel injection valve
      Cylinder 3 fuel injection valve
      Cylinder 4 fuel injection valve
      Cylinder 5 fuel injection valve
      Cylinder 6 fuel injection valve
   OM642: CDI control unit
2009→:
   M272, M273:
      ME-SFI [ME] control unit
      Circuit 87 M1i connector sleeve
   M276: Engine/engine compartment connector
   OM642.950:
      CDI 1.0 PK control unit
      Engine compartment/interior compartment connector
   OM642.870/872:
      CDI control unit
      Engine compartment/interior compartment connector
      Circuit 87 connector sleeve
106 - -
107 40 M113, M272, M273: Electric air pump
108 40 AIRmatic compressor unit
109 25 ESP control unit
110 10 Alarm signal horn with additional batteryAlarm siren
111 30 Intelligent servo module for DIRECT SELECT
112 7.5 Left front lamp unit
Right front lamp unit
113 15 Left fanfare horn
Right fanfare horn
114 5 →2008:
   Front SAM control unit
   M272: ME control unit
2009→: Front SAM control unit
115 5 ESP control unit
116 7.5 Electric controller unit (VGS)
117 7.5 Distronic (DTR) controller unit
118 5 M272, M273, M276: ME control unit
OM642: CDI control unit
119 5 OM642.870/872: CDI control unit
120 10 →2008:
   M113, M272: ME control unit
   OM642: CDI control unit
2009→:
   M272, M273, M276:
      Engine circuit 87 relay
      ME-SFI [ME] control unit
   OM642: Engine circuit 87 relay
121 20 STH heater unit
122 25 M113, M272, M273, M276, OM642: Starter
123 20 Diesel (01.09.2008→): Fuel filter condensation sensor with heating element
124 7.5 2009→: Electrohydraulic power steering
125 - -
Relays
A Wiper stage 1 and 2
B Wiper ON / OFF
C OM642: Additional circulation pump for transmission oil cooling
M156: Engine coolant circulation pump
D Terminal 87 engine
E Secondary air injection pump
F Horn
G Air suspension compressor
H Circuit 15
I Starter

Battery Compartment Prefuse Box

Fuses Specifications
No. A Description
78 150 Diesel: Heater booster control unit
79 60 Rear SAM control unit
80 60 Rear SAM control unit
81 40 2009→:
   OM642.870: AdBlue® supply relay
   M276: Engine compartment fuse and relay box
82 150 →2008: Load compartment fuse and relay box
100 2009→: Load compartment fuse and relay box
83 5 USA: WSS (Weight Sensing System) control unit
84 10 Restraint systems control unit
85 25 2009→: DC/AC converter control unit (115 V socket)
86 30 Cockpit fuse box
87 30 -
88 70 →2008: Front SAM control unit
40 2009→: Front SAM control unit
89 70 Front SAM control unit
90 70 Front SAM control unit
91 40 Blower regulator

Front Prefuse

Fuses Specifications
No. A Description
4 - -
5 40 01.07.2009→: ESP control unit
6 40 →30.06.2009: ESP control unit
100 01.07.2009→: Electrohydraulic power steering
7 100 AAC with integrated control additional fan motor
8 150 Engine compartment fuse and relay box