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Home >> Mercedes Benz >> 2009 >> R320 >> Repair and Diagnosis >> Electrical >> Body Electrical >> Electrical System, Equipment & Instructions - 251 Chassis - 1 Of 4 >> Basic Knowledge >> Fuse assignment of fuse and relay box in right engine compartment - GF54.15-P-1256-02RT

Fuse assignment of fuse and relay box in right engine compartment - GF54.15-P-1256-02RT

MODEL 251 up to Model Year 8 

Fig 1: Engine Compartment Fuse And Relay Box
G07005499Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The engine compartment fuse and relay box is located in the right of the engine compartment behind the headlamp.

Fuse Clamping device Cable ID (cable fused) Fused function Rating in amperes (A)
f100 30 2.5 GYBK
2.5 GYWH
  • Wiper motor (M6/1)
 30
f101 87 1.0 PK
  • AAC with integrated control additional fan motor (M4/7)
 15
1.0 PKWH Valid for engines 113, 272: 
  • Purge control valve (Y58/1)
1.5 PKBU Valid for engine 272: 
  • Radio interference suppression capacitor 1 (C4/1)
  • Radio interference suppression capacitor 2 (C4/2)
  • Cylinder 1 ignition coil (T1/1)
  • Cylinder 2 ignition coil (T1/2)
  • Cylinder 3 ignition coil (T1/3)
  • Cylinder 4 ignition coil (T1/4)
  • Cylinder 5 ignition coil (T1/5)
  • Ignition coil, cylinder 6 (T1/6)

Valid for engine 642: 
1.0 RDBK
  • O2 sensor upstream of CAT (G3/2)
2.5 PKBK
  • CDI control unit (N3/9)
f102   0.75 RDBU Valid for engine 642: 
  • Recirculation pump for transmission oil cooler (M13/7)

Valid for engine 156: 
  • engine coolant circulation pump (M45)
 15
f103 87 1.0 PKBK Valid for engine 113: 
  • ME-SFI [ME] control unit (N3/10/)
  • Cylinder 1 fuel injection valve (Y62y1)
  • Cylinder 2 fuel injection valve (Y62y2)
  • Cylinder 3 fuel injection valve (Y62y3)
  • Cylinder 4 fuel injection valve (Y62y4)
  • Cylinder 5 fuel injection valve (Y62y5)
  • Cylinder 6 fuel injection valve (Y62y6)
  • Cylinder 7 fuel injection valve (Y62y7)
  • Cylinder 8 fuel injection valve (Y62y8)
 25
2.5 PKBK Valid for engine 642: 
  • CDI control unit
f104 87 0.75 RDGN Valid for engine 113: 
  • Left O2 sensor upstream TWC [KAT] (G3/3)
  • Right oxygen O2 sensor upstream of catalytic converter (G3/4)
 15
0.5 RDGN
  • Left O2 sensor downstream TWC [KAT] (G3/5)
  • Right O2 sensor downstream TWC [KAT] (G3/6)
  • Variable intake manifold switchover valve (Y22/6)
  • EGR vacuum transducer (Y31/1)
  • Air pump change-over valve (Y32)

Valid for engine 272: 
0.5 RDGN
  • Heating system shutoff valve (Y16/2)
  • Intake manifold tumble flap switchover valve (Y22/9)
  • Air pump change-over valve (Y32)
  • Three-disk thermostat valve (Y110)
0.75 RDGN
  • Pressure regulating on the valve power steering unit pump (Y10/1)
2.5 PKBK Valid for engine 642: 
  • Left hot film mass air flow sensor (B2/6)
  • Right hot film mass air flow sensor (B2/7)
  • Intake port shutoff motor (M55)
  • Glow time output stage (N14/3)
  • Vent line heater element (R39/1/)
  • Power steering pump pressure regulator valve
  • Left exhaust gas recirculation positioner (Y27/9)
  • Boost pressure positioner (Y77/1)
f105 87 0.75 YEBK Valid for engine 113: 
  • ME control unit
 15
1.5 PKBK
  • 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
  • Ignition coil cylinder 8
1.5 PKBK Valid for engine 272: 
  • ME control unit
1.0 PK
  • Hot film mass air flow sensor
  • Hall sensor for left inlet camshaft (B6/4)
  • Right intake camshaft Hall sensor (B6/5)
  • Left exhaust camshaft Hall sensor (B6/6)
  • Right exhaust camshaft Hall sensor (B6/7)
  • Left intake camshaft solenoid (Y49/4)
  • Right camshaft intake solenoid (Y49/5)
  • Left exhaust camshaft solenoid (Y49/6)
  • Right exhaust camshaft solenoid (Y49/7)
  • 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
2.5 PKBK Valid for engine 642: 
  • CDI control unit
f106 - - - -
f107 87 4.0 GNWH Valid for engine 113: 
  • Electric air pump (M33)
 40
4.0 WHBU Valid for engine 272: 
  • Electric air pump
f108 87 4.0 GYWH Valid for code 489 Airmatic (air suspension with level adjustment and Adaptive damping system ADS): 
  • AIRmatic compressor unit (A9/1)
 40
f109 30 2.5 RD
  • ESP control unit (N47-5)
 25
f110 30 0.75 RD Valid except code 494 USA version: 
  • Alarm signal horn with additional battery (H3/1)
 10
f111 30 2.5 RDBK
  • Intelligent servo module for DIRECT SELECT (A80)
 30
f112 15 1.5BKBU
  • Left front lamp unit (E1)
  • Right front lamp unit (E2)
 7.5
f113 15 1.5 BUWH
  • Left fanfare horn (H2)
  • Right fanfare horn (H2/1)
 15
30 1.5 BUWH Option, customer request: 
  • Left fanfare horn
  • Right fanfare horn
 15
f114 15 0.5 BK
  • Front SAM control unit (N10)

Valid for engine 272: 		 5
0.75 BN
  • ME control unit
f115 15 0.75 BKBU
  • ESP control unit
 5
f116 15 1.0 RD
  • Electric controller unit (VGS) (Y3/8)
 7.5
f117 15 0.75 BKBU Valid for code 219 Distronic (DTR): 
  • DTR controller unit (A89)
 7.5
f118 15 0.75 BKBU Valid for engine 272: 
  • ME control unit
 5
0.5BKBU Valid for engine 642: 
  • CDI control unit
f119 - - - -
f120 30 1.0 RDBK Valid for engine 113: 
  • ME control unit
 10
0.75 RDBK Valid for engine 272: 
  • ME control unit
0.5 RDBK Valid for engine 642: 
  • CDI control unit
f121 30 0.5 RD
  • STH heater unit (A6)
 20
f122 50 2.5 GYWH Valid for engine 113: 
  • Starter (M1)
 25
2.5 RDWH Valid for engine 272: 
  • Starter
2.5 PK Valid for engine 642: 
  • Starter
f123 15 - - -
f124 15 - - 5
f125 30 - - 20
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