Mercedes-Benz R-Class (W251) (2005-2013) – fuse box diagram
Year of manufacture: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013.
Lighter fuse (socket) in Mercedes R (W251) (2005-2013). Is fuse 46 in the fuse box in the trunk.
Fuse box in the trunk
until 31.05.2006
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
from 01.06.2006
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_898_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_898_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_898_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
No. | Description | Amps [A] |
20 | Interference filter for radio antenna;
Microphone set control unit (until 2008); Voice Control System (VCS [SBS]); Control unit (until 2008). |
5 |
21 | CPR control unit [HBF] | 5 |
22 | Parktronic system control unit (PTS);
Stationary heater (STH); Radio remote control receiver (from 2009). |
5 |
23 | DVD player (rear entertainment system);
E-net Compensator; Rear audio control unit (until 2008); CTEL portable separation point (until 2008); CTEL portable universal interface control unit (UPCI [UHI]) (until 2008); Operating, visualization and controller module COMAND (from 2009). |
10 |
24 | Emergency voltage reversible right front retractor | 40 |
25 | until 2008 ..:
Radio; Radio and navigation unit; Command operation, display and control unit. |
15 |
as of 2009:
Radio; Radio and navigation unit; Command operation, display and control unit. |
20 | |
26 | Front right door control unit | 25 |
27 | Front passenger seat adjustment comfort relay (until 2008);
Front seat adjustment control unit Passenger side seat with memory. |
30 |
28 | Seat Comfort Adjustment Relay
Driver (until 2008); Front seat adjustment control unit Driver’s side with memory. |
30 |
29 | Front left reversible emergency voltage retractor | 40 |
30 | until 2008 ..:
Valid for 156 engine: Left fuel pump controller; Right fuel pump controller; from 2009 ..: Fuel system controller. |
40 |
31 | HS [SIH]seat ventilation and steering wheel heating control | 10 |
32 | AIRmatic with ADS control unit;
Control unit for the rear axle level control system. |
15 |
33 | Keyless Go control unit | 25 |
34 | Front left door control unit | 25 |
35 | Sound system amplifier;
Subwoofer amplifier (from 2009). |
30 |
36 | until 2008
Control unit for the emergency call system. |
5 |
until 2008 ..:
Japanese version : VICS + ETC voltage separation point; from 2009 ..: Control unit for the emergency call system. |
10 | |
37 | Reversing Chamber Power Module
(from 01.06.2006); Reversing camera control unit (from 01.06.2006, Japanese version). |
5 |
38 | Audio gateway control unit (up to 2008);
Digital TV tuner Combined TV tuner (analog/digital). |
10 |
39 | by 2008:
SDAR control unit (American version); Tire pressure monitor (TPM) [RDK]; 2009 onwards: Tire Pressure Monitor (TPM) [RDK]; Control unit; High Definition Tuner; Digital audio broadcasting control unit; Separation of external navigation points. |
7,5 |
40 | until 2008
Rear door closing control unit |
40 |
as of 2009:
Rear door closing control unit |
30 | |
41 | Hanging control panel control unit | 25 |
42 | Hanging control panel control unit | 25 |
43 | Until 31.05.2006:
Rear door wiper motor Third row seat left socket Third row seat right position as of 2009 ..: Valid for 272, 273, 276 engines: Fuel system control unit; Applies to the 642.872 engine: Correct fuel system control unit. |
20 |
44 | Until 31.05.2006:
Left seat slot in the second row; Second row of seats on the right; from 2009 ..: American version: Front interior socket; 115 V socket. |
20 |
45 | until 2008 ..:
Luggage compartment connection box until 31.05.2006 ..: Front interior socket; from 01.06.2006 ..: Taking the left seat of the second row; Right socket of the second row seat; from 2009 ..: Slot to the right of the second row seat; Starter socket. |
20 |
46 | Front cigarette lighter with ashtray lighting | 15 |
47 | since 2009 ..:
Illuminated trim of the left front door sill; Illuminated right sill door trim. |
10 |
48 | since 2009 ..:
Valid for engine 642.870: AdBlue supply relay ® |
5 |
49 | Antenna coil on the right (until 2008);
Heated rear window. |
30 |
50 | until 2008
Rear door wiper motor |
10 |
from 2009 onwards:
Rear door wiper motor |
15 | |
51 | Activated Carbon Filter Stop Valve | 5 |
52 | by 30.6.09:
Left front reversible emergency voltage retractor; Right front reversible emergency voltage retractor. |
5 |
53 | AIRmatic with ADS control unit;
Control unit for the rear axle level control system; until 2008 ..: Valid for 156 engine: Left fuel pump control unit; Right fuel pump control unit. from 2009 ..: Valid for engine 272, 273, 276: Fuel system control unit; Valid for engine 642.872: Correct fuel system control unit. |
5 |
54 | SAM front control unit
Range control unit Headlights (bi xenon headlight assembly). |
5 |
55 | Rotating light switch;
Instrument cluster. |
7,5 |
56 | by 2008 ..:
Data link connector; from 2009 ..: Valid for engine 642.870: AdBlue control unit ®. |
5 |
57 | by 2008 ..:
Fuel pump with fuel level sensor; from 2009 ..: Valid for engine 642.870: Fuel Pump. |
20 |
58 | Data link connector;
Central gateway control unit. |
7,5 |
59 | NECK-PRO driver headrest solenoid;
NECK-PRO solenoid for passenger headrest. |
7,5 |
60 | until 2008 ..:
Switch-mounted storage compartment lighting; Rear SAM control unit; Engine compartment fuse and relay box; CTEL VICS + ETC separation point; Supply voltage separation point (Japanese version); Emergency call system control unit; from 2009 ..: Glove box lighting with switch; Engine compartment fuse and relay box; Rear SAM control unit; Cell phone separation point; VICS + ETC power separation point (Japanese version); Multi-contour pneumatic seat pump; External navigation separation point; Control unit for the emergency call system; Rear bumper interior Blind Spot Monitoring of the electrical connector. |
5 |
61 | Safety systems control unit;
Right front seat contact strip. |
10 |
62 | Front passenger seat adjustment switch;
Control unit for the backrest adjuster passenger lumbar support. |
30 |
63 | Driver’s seat adjustment switch;
Driver’s lumbar support adjuster control unit. |
30 |
64 | – | – |
65 | – | – |
66 | from 2009 onwards:
Pneumatic multi-contour seat pump |
30 |
67 | Rear air conditioning fan motor | 25 |
68 | until 2008 ..:
Heated rear seats; from 2009 ..: Seat heater, seat ventilation, and steering wheel heater control. |
25 |
69 | – | 30 |
70 | Trailer hitch socket (13-pin);
Trailer hitch socket (7-pin) (American version). |
20 |
71 | American version:
Separation point for the electric brake control. |
30 |
72 | Trailer Hitch Socket (13-pin) | 15 |
Relay | ||
K | until 31.05.2006:
Terminal 15R output relay, with power off; as of 06.01.2006: Relay, 15R socket circuit (with switch off) (power supply for electric seat adjustment). |
|
L | Terminal 30X | |
M | Heated rear window relay | |
N | Relay circuit 15/terminal 87FW | |
O | Fuel pump relay | |
P | Rear wiper relay | |
R | R 15R circuit relay | |
S | Reserve 1 (changer) (front socket power supply) | |
T | as of 01.06.2006:
Spare 2 (normally open contact) (central and rear socket supply) |
|
U | as of 01.06.2006
Trailer relay terminal 30 |
|
V | as of 01.06.2006
Reserve courier 2 |
Passenger compartment fuse box
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_37_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_37_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_37_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
No. | Description | Amps [A] |
10 | Electronic Booster Fan Controller | 10 |
11 | Instrument cluster | 5 |
12 | Control and maintenance unit for automatic air conditioning [KLA]; | 15 |
13 | Upper control panel;
Steering column module. |
5 |
14 | CD Switch (until 2008);
EZS control unit. |
7,5 |
15 | Electronic Interface Control Unit
Compass multimedia (from 2009). |
5 |
16 | – | – |
17 | – | – |
18 | – | – |
Fuse box in engine compartment
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_507_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_507_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_507_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
No. | Description | Amps [A] |
100 | Windshield wiper motor | 30 |
101 | until 2008:
AAC with integrated auxiliary control fan motor; Applies to motors 113, 272: Blowdown control valve; Valid for engine 272: Radio interference suppression capacitor 1; Radio interference suppression capacitor 2; Cylindrical ignition coil 1; Cylinder 2 ignition coil; Cylinder 3 ignition coil; Cylinder 4 ignition coil; Cylinder 5 ignition coil; Cylinder 6 ignition coil; Valid for engine 642: O2 sensor upstream of CAT CDI control unit; from 2009 ..: Electric motor and air conditioning intake fan With integrated control; Valid for engine 272, 273: Blowing commutation; 87 M1e circuit connection bushing; Valid with 642 motor: CDI control unit; O2 sensor before CAT; Valid for 642.870 / 872 engine: O2 sensor before CAT. |
15 |
102 | until 2008:
Valid for 642 engine: Recirculation pump for transmission oil cooler; Valid for 156 engine: Engine coolant circulation pump; 2009 onwards: Valid for engine 642, engine 642.870 until 31.7.10: Transmission cooler circulation pump; Valid with 276 engine: Charge air cooler circulation pump. |
15 |
103 | until 2008 ..:
It applies to the 113 engine: ME-SFI Controller [ME]; 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; Valid for 642 engine: CDI control unit; 2009 onwards: Valid for engine 642.950, 642.870 / 872: CDI control unit; Valid for engine 272: ME-SFI control unit [ME]; Valid with engine 276: ME -SFI [ME] control unit; Motor/engine compartment connector. |
25 |
104 | until 2008 ..:
It applies to the 113 engine: Left O2 sensor above TWC [KAT]; O2 oxygen sensor right before the catalytic converter; Left O2 sensor after catalytic converter TWC [KAT]; Right O2 sensor behind TC valve [KAT]; Variable intake manifold switch valve; EGR vacuum transducer; Air pump diverter valve; Valid for engine 272: Heating system shut-off valve; Intake manifold flap switch valve; Air pump diverter valve; Thermostatic valve with three discs; Pressure control on system pump valve power steering; Applies to the 642 engine: Mass air with hot air flow sensor; Hot foil mass airflow sensor on the right; Inlet spigot cutting motor; Output phase in light time; Heating element of the vent line; Power steering pump pressure regulating valve; Left exhaust gas recirculation adjuster; Thrust pressure adjuster; from 2009 ..: Valid for engine 272, 273: Coupling sleeve, circuit 87 M2e; Valid for motor 642.950: 87 circuit connector sleeve; Valid for 642.870 / 872 motor: 87D2 circuit connection bushing. |
15 |
105 | until 2008 ..:
Valid for the 113 engine: ME control unit; Radio interference suppression capacitor 1; Radio interference suppression capacitor 2; Cylindrical ignition coil 1; Cylinder 2 ignition coil; Cylinder 3 ignition coil; Cylinder 4 ignition coil; Cylinder 5 ignition coil; Cylinder 6 ignition coil; Cylinder Ignition Coil 7; Cylindrical Ignition Coil 8; Refers to Engine 272: Controller ME; Hot sheet mass airflow sensor; Hall sensor for left inlet valve crankshaft; Right intake valve camshaft; Hall sensor Left camshaft; Hall sensor right exhaust camshaft; Hall sensor left solenoid valve Intake camshaft; Right camshaft intake solenoid; Right camshaft exhaust valve solenoid; Right camshaft solenoid valve of 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; Applies to the 642 engine: CDI Controller; 2009 onwards: Valid for engine 272, 273: ME-SFI control unit [ME]; Circuit 87 M1i connection sleeve; Valid with motor 276: Engine/engine compartment connector; Valid for motor 642.950: CDI 1.0 PK control unit; Engine compartment/internal compartment connector; Valid for 642.870 / 872 engine: CDI control unit; Engine compartment/internal compartment connector 87 circuit connector sleeve. |
15 |
106 | – | – |
107 | Valid for engines 113, 272, 273:
Electric air pump. |
40 |
108 | AIRmatic Compressor | 40 |
109 | ESP Control Unit | 25 |
110 | Alarm beacon with additional battery;
Alarm siren. |
10 |
111 | Intelligent servo module for DIRECT SELECT | 30 |
112 | Front left light;
Front light right. |
7,5 |
113 | Left horn;
Right horn. |
15 |
114 | until 2008 ..:
SAM front control unit; Valid for engine 272: ME control unit; from 2009 ..: SAM front control unit. |
5 |
115 | ESP Control Unit | 5 |
116 | Electrical Controller (VGS) | 7,5 |
117 | District Control Unit (DTR) | 7,5 |
118 | Valid for engine 272, 273, 276:
ME control unit; Valid for motor 642: CDI control unit. |
5 |
119 | Valid for engine 642.870 / 872:
CDI control unit |
5 |
120 | until 2008:
Valid for engine 113, 272: ME control unit; Valid for motor 642: CDI control unit; 2009 onwards: Valid for engine 272, 273, 276: Engine circuit 87; ME-SFI Relay [ME]; Valid with 642 engine: Engine circuit 87 relay. |
10 |
121 | STH Heater | 20 |
122 | Valid for engines 113, 272, 273, 276, 642:
Starter. |
25 |
123 | Valid for diesel engine as of 1.9.08:
Fuel filter condensation sensor with heating element. |
20 |
124 | since 2009 :
Electro-hydraulic power steering. |
7,5 |
125 | – | – |
Relay | ||
A | Windshield wiper stage 1 and 2 | |
B | Windshield wiper ON. ON / OFF | |
C | Valid for engine 642:
Additional circulation pump for transmission oil cooling; Valid for 156 engine: Engine coolant circulation pump. |
|
D | Motor terminal 87 | |
E | Secondary air injection pump | |
F | Horn | |
G | Air Suspension Compressor | |
H | Circumference 15 | |
I | Starter |
Battery compartment pre-fuse box
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_746_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_746_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_746_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
No. | Description | Amps [A] |
78 | Diesel engine:
heating assistance control unit. |
150 |
79 | Rear SAM control unit | 60 |
80 | Rear SAM control unit | 60 |
81 | as of 2009:
Valid for engine 642.870: AdBlue supply relay ®; Valid with engine 276: Engine compartment fuse and relay box. |
40 |
82 | until 2008
Load compartment fuse i Relay box |
150 |
as of 2009:
Load compartment fuse i Relay box |
100 | |
83 | American version:
WSS (Weight Sensing System) control unit |
5 |
84 | Control unit for restraint systems | 10 |
85 | as of 2009:
Transducer Control Unit DC/AC (115 V socket) |
25 |
86 | Cockpit fuse box | 30 |
87 | – | 30 |
88 | until 2008
SAM front control unit |
70 |
as of 2009:
SAM front control unit |
40 | |
89 | SAM front control unit | 70 |
90 | SAM front control unit | 70 |
91 | Fan Controller | 40 |
Front prefix
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_373_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_373_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
![](https://fuse-box-diagrams.com/wp-content/uploads/2023/01/1674245172_373_Mercedes-Benz-R-Class-W251-2005-2013-Fuse-box.jpg)
No. | Description | Amps [A] |
4 | – | – |
5 | Effective 1.7.09:
ESP Control Unit |
40 |
6 | Valid until 30.6.09:
ESP Control Unit |
40 |
Effective 1.7.09:
Electro-hydraulic power steering |
100 | |
7 | A100AC with integrated additional fan motor control. | |
8 | Engine compartment fuse and relay box. | 150 |