Jonathan Yarden Mar 25, 2021 · 5 min. read
In this article you will find a description of fuses and relays Mercedes-Benz,with photos of block diagrams and their locations.Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.
F32 – Front electrical prefuse box
F33 – Rear prefuse box (engine 273.9)
F96 – Additional battery circuit 30 fuse (7,5 A)(with ECO start/stop )
F270 – Additional battery protection (Hybrid)
K40/10 – HYBRID fuse and relay module (Hybrid)
K114 – ECO start/stop function additional battery relay
N10/1 – Front SAM control unit with fuse and relay module
N10/2 – Rear SAM control unit with fuse and relay module
Electronic Stability Program control unit
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Hybrid: Regenerative braking system control unit
Valid for right-hand drive vehicles:Blower regulator
Valid for right-hand drive vehicles as of 01.06.2010:Left rear door control unit
Valid for left-hand drive vehicles as of 01.06.2010:Right rear door control unit
Valid for engine 642, 651 up to 31.05.2010:Fuel filter condensation sensor with heating element
Exterior lights switch
Rear SAM control unit with fuse and relay module
Valid as of 01.03.2013:Electronic Stability Program control unit
Valid as of 01.03.2013:Premium Electronic Stability Program control unit
Valid for gasoline engine:ME-SFI control unit
Valid for engine 271.958, 274.920:CNG control unit
Wiper park position heater
Audio/COMAND control panel
Navigation module
Cradle for navigation module
COMAND fan motor
Upper control panel control unit
Valid for transmission 722, 724, 725:Automatic transmission transmission mode button
AIRMATIC:Suspension button group
Multifunction camera
Stereo multifunction camera
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Valid with transmission 722.930/931:DIRECT SELECT INTERFACE
Valid for transmission 722 (except 722.930/931):Electronic selector lever module control unit
Panoramic sliding roof control module
Hybrid:Power electronics control unit
Valid up to 28.02.2013:
Instrument panel switch group
Upper control panel control unit
Valid for transmission 722 with ECO start/stop:Transmission oil auxiliary pump relay
Electronic ignition lock control unit
Electric steering lock control unit
Electronic Stability Program control unit
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Valid for left-hand drive vehicle, Hybrid:Regenerative braking system control unit
Weight sensing system (WSS) control unit
except Hybrid up to 28.02.2013:Brake lights switch
Hybrid up to 28.02.2013:
Hybrid brake light switch
Switched through glove compartment lamp switch
Glove compartment lamp
Valid for engine 156:
Electrical connector for interior harness and engine wiring harness
Circuit 87 M2e connector sleeve
Valid for engine 157, 271, 272, 273, 274, 276, 278:Electrical connector for interior harness and engine wiring harness
Valid for engine 271, 272.98, 274.9, 276 and engine 651 (except with 4MATIC):Radiator shutters actuator
Valid for engine 642, 651:
CDI control unit
Electrical connector for interior harness and engine wiring harness
Valid for engine 271, 642, 651:Circuit 87 M1e connector sleeve
Valid for engine 156, 157, 271, 272, 273, 274, 276, 278, 642, 651:Electrical connector for interior harness and engine wiring harness
Valid for engine 271:ME-SFI control unit
Valid for diesel engine:CDI control unit
Valid for gasoline engine:ME-SFI control unit
Valid for engine 271.958, 274.920:CNG control unit
Nitrogen oxides control unit downstream of diesel particulate filter
Nitrogen oxides control unit downstream of the SCR catalytic converter
Soot particulate sensor control unit
Valid for gasoline engine:ME-SFI control unit
Hybrid:
Transmission cooling coolant circulation pump relay
HYBRID power electronics coolant circulation pump relay
Valid for engine 156:Connector sleeve, circuit 87 M3e
Radio with auto pilot system
COMAND controller unit
Valid for diesel engine:
CDI control unit
Electronic ignition lock control unit
Valid for engine 271.958, 274.920:CNG control unit
Right fanfare horn
Right fanfare horn
Valid for transmission 722.9, 724, 725:Fully integrated transmission control controller unit
Valid up to 28.02.2013:DISTRONIC electric controller unit
Valid as of 01.03.2013:Front long-range radar sensor
Valid as of 01.03.2013:COLLISION PREVENTION ASSIST controller unit
Front passenger seat NECK-PRO head restraint solenoid
Valid for right-hand drive vehicles as of 01.06.2010:Left front door control unit
Valid for left-hand drive vehicles as of 01.06.2010:Right front door control unit
Valid for engine 156, 271, 272, 273, 274, 276, 278, 642, 651:Fuel system control unit
Rear window antenna amplifier 1
DAB band III antenna
Alarm siren
Interior protection and tow-away protection control unit
Valid as of 01.06.2011 on engine 157, 276, 278:Coolant circulation pump relay
Right front illuminated door sill molding voltage converter
Right front bumper DISTRONIC (DTR) sensor
Tailgate control control unit
Rear axle electronic level control control unit
Front cigarette lighter with ashtray illumination
Stationary heater radio remote control receiver
Valid with transmission 722.930/931:Transmission mode control unit
Valid as of 01.03.2013:Right front lamp unit
Valid as of 01.03.2013:Left front lamp unit
Valid as of 01.12.2011:DC/AC converter control unit
Valid as of 01.03.2013 (with Dynamic LED headlamps:
Left front lamp unit
Right front lamp unit
Rear center console socket
Rear USB electrical connection
Valid until 28.02.2013:Weight sensing system (WSS) control unit
Valid for China, South Korea vehicles:Navigation processor
Multimedia connection unit
Valid as of 01.06.2010:Video and radar sensor system control unit
Valid as of 01.03.2013:Chassis gateway control unit
Mobile phone electrical connector
Navigation processor
Right front seat ventilation blower regulator
Emergency call system control unit
Valid until 31.05.2010:Navigation processor
Japan version:Electronic Toll Collection control unit
Digital Audio Broadcasting control unit
Valid up to 28.02.2013:Reversing camera control unit
Valid as of 01.03.2013:Reversing camera
Valid up to 31.05.2010:SDAR/high definition tuner control unit
Valid as of 01.06.2010:Satellite digital audio radio (SDAR) control unit
Valid as of 01.03.2013:360° camera control unit
Valid until 28.02.2015 :Digital TV tuner
Valid as of 01.03.2015:Tuner unit
Left rear display
Right rear display
Special vehicle multifunction control unit (SVMCU)
Valid as of 01.06.2011 with engine 157, 274, 276, 278:Coolant circulation pump relay
Valid as of 01.03.2015:Telematics services communications module
Special vehicle multifunction control unit (SVMCU)
Valid up to 28.02.2013 with engine 157:Fuel system control unit
Valid as of 01.03.2013 (with Static LED headlamps):
Right front lamp unit
Left front lamp unit
Valid for engine 642.8 with BlueTEC:AdBlue® fuse block
Valid as of 01.03.2013:Rear switching module
Valid until 30.11.2011:DC/AC converter control unit
Valid for right-hand drive vehicles:
Electronic Stability Program control unit
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Electronic Stability Program control unit
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Valid with transmission 725:Fully integrated transmission control unit
F12 – Stationary heater fuse (Hybrid)
F37 – AdBlue®fuse block (with engine 642.8 with BlueTEC)
K27/7 – AdBlue®supply relay (with engine 642.8 with BlueTEC)
K60 – Coolant circulation pump relay (as of 01.06.2011 with engine 157, 274, 276, 278)
K67 – AIRMATIC relay
K109 – Vacuum pump relay (+) (Hybrid)
K109/1 – Vacuum pump relay (-) (Hybrid)
WARNING:Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.