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
| Fuse | A | Circuit protected |
| 1 | 25 | Valid for left-hand drive vehicle:
Electronic Stability Program control unit
Premium Electronic Stability Program control unit
Hybrid: Regenerative braking system control unit
Valid for right-hand drive vehicles:Blower regulator |
| 2 | 30 | up to 31.05.2010:Left front door control unit
Valid for right-hand drive vehicles as of 01.06.2010:Left rear door control unit |
| 3 | 30 | up to 31.05.2010:Right front door control unit
Valid for left-hand drive vehicles as of 01.06.2010:Right rear door control unit |
| 4 | 20 | Valid with engine 157:Fuel system control unit
Valid for engine 642, 651 up to 31.05.2010:Fuel filter condensation sensor with heating element |
| 7,5 | Valid for engine 651 (with retrofitted heated fuel filter) up to 31.05.2010:Control unit for fuel filter condensation sensor with heating element |
| 5 | 7,5 | Instrument cluster
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 |
| 6 | 10 | 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 |
| 7 | 20 | Starter |
| 8 | 7,5 | Supplemental restraint system control unit |
| 9 | 15 | Glove compartment socket |
| 10 | 30 | Wiper motor
Wiper park position heater |
| 11 | 7,5 | Audio/COMAND display
Audio/COMAND control panel
Navigation module
Cradle for navigation module
COMAND fan motor |
| 12 | 7,5 | ACC control and operating unit
Upper control panel control unit
Valid for transmission 722, 724, 725:Automatic transmission transmission mode button
AIRMATIC:Suspension button group |
| 13 | 7,5 | Steering column tube module control unit
Multifunction camera
Stereo multifunction camera |
| 14 | 7,5 | Electronic Stability Program control unit
Premium Electronic Stability Program control unit |
| 15 | 7,5 | Supplemental restraint system control unit |
| 16 | 5 | Hybrid:Electrical refrigerant compressor
Valid with transmission 722.930/931:DIRECT SELECT INTERFACE
Valid for transmission 722 (except 722.930/931):Electronic selector lever module control unit |
| 17 | 30 | Overhead control panel control unit
Panoramic sliding roof control module |
| 18 | 7,5 | Exterior lights switch
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 |
| 19 | 20 | Valid except transmission 722.9:
Electronic ignition lock control unit
Electric steering lock control unit |
| 20 | 40 | Valid for left-hand drive vehicle:
Electronic Stability Program control unit
Premium Electronic Stability Program control unit
Valid for left-hand drive vehicle, Hybrid:Regenerative braking system control unit |
| 21 | 7,5 | Front passenger seat occupied recognition and ACSR
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 |
| 22 | 15 | Valid for fan motor with 650, 800 W:Fan motor for internal combustion engine and air conditioning with integrated control
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 |
| 23 | 20 | Valid for diesel engine:Rear SAM control unit with fuse and relay module
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 |
| 24 | 15 | Valid for engine 156, 157, 271, 272, 273, 274, 276, 278, 642, 651:Electrical connector for interior harness and engine wiring harness
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 |
| 25 | 15 | Valid for engine 642, 651 with BlueTEC:
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 |
| 26 | 20 | Radio
Radio with auto pilot system
COMAND controller unit |
| 27 | 7,5 | Valid for gasoline engine:ME-SFI control unit
Valid for diesel engine:
CDI control unit
Electronic ignition lock control unit
Valid for engine 271.958, 274.920:CNG control unit |
| 28 | 7,5 | Instrument cluster |
| 29 | 10 | Valid up to 28.02.2013:Right front lamp unit |
| 30 | 10 | Valid up to 28.02.2013:Left front lamp unit |
| 31A | 15 | Left fanfare horn
Right fanfare horn |
| 31B | 15 | Left fanfare horn
Right fanfare horn |
| 32 | 40 | Valid for engine 272:Electric air pump |
| 33 | 10 | Valid for transmission 722.6:Electronic transmission control control unit
Valid for transmission 722.9, 724, 725:Fully integrated transmission control controller unit |
| 34 | 7,5 | Valid for engine 156, 271, 272, 273, 642, 651:Fuel system control unit |
| 35 | 7,5 | Hybrid:HYBRID control unit power supply relay |
| 36 | 7,5 | Night View Assist control 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 |
| Relay |
| J | Circuit 15 relay |
| K | Circuit 15R relay |
| L | Wiper park position heater relay |
| M | Starter circuit 50 relay |
| N | Engine circuit 87 relay |
| O | Horn relay |
| P | Valid for engine 272:Secondary air injection relay |
| Q | Transmission oil auxiliary pump relay |
| R | Chassis circuit 87 relay |
| No. | Circuit protected | A |
| 37 | Driver seat NECK-PRO head restraint solenoid
Front passenger seat NECK-PRO head restraint solenoid | 7,5 |
| 38 | Valid for model 212.2:Tailgate wiper motor | 15 |
| 39 | up to 31.05.2010:Left rear door control unit
Valid for right-hand drive vehicles as of 01.06.2010:Left front door control unit | 30 |
| 40 | Spare | — |
| 41 | up to 31.05.2010:Right rear door control unit
Valid for left-hand drive vehicles as of 01.06.2010:Right front door control unit | 30 |
| 42 | Fuel pump relay
Valid for engine 156, 271, 272, 273, 274, 276, 278, 642, 651:Fuel system control unit | 25 |
| 43 | Telematics services communications module | 7,5 |
| 44 | Front passenger seat partially electric seat adjustment switch | 30 |
| 45 | Driver seat partially electric seat adjustment switch | 30 |
| 46 | FM 1, AM, CL [ZV] and KEYLESS-GO antenna amplifier
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 | 7,5 |
| 47 | Spare | — |
| 48 | Spare | — |
| 49 | Rear window heater | 40 |
| 50 | Right front reversible emergency tensioning retractor | 50 |
| 51 | Left front reversible emergency tensioning retractor | 50 |
| 52 | Spare | — |
| 53 | Trailer recognition control unit | 30 |
| 54 | Trailer recognition control unit | 15 |
| 55 | Spare | — |
| 56 | Trailer socket | 15 |
| 57 | Trailer recognition control unit | 20 |
Left front illuminated door sill molding voltage converter
Right front illuminated door sill molding voltage converter | 7,5 |
| 58 | Trailer recognition control unit | 25 |
| 59 | Left front bumper DISTRONIC (DTR) sensor
Right front bumper DISTRONIC (DTR) sensor | 7,5 |
| 60 | Multicontour seat pneumatic pump | 7,5 |
| Dynamic multicontour seat pneumatic pump | 30 |
| 61 | Trunk lid control control unit
Tailgate control control unit | 40 |
| 62 | Driver seat control unit | 25 |
| 63 | Rear seat heater control unit | 25 |
| 64 | Front passenger seat control unit | 25 |
| 65 | up to 28.02.2013:Steering wheel heater control unit | 7,5 |
| as of 01.03.2013:Steering column tube module control unit | 10 |
| 66 | Rear blower motor | 7,5 |
| 67 | Sound system amplifier control unit | 40 |
| 68 | AIRmatic control unit
Rear axle electronic level control control unit | 15 |
| 69 | Rear bass speaker amplifier | 25 |
| 70 | Tire pressure monitor control unit | 5 |
| 71 | Vehicle interior socket, front
Front cigarette lighter with ashtray illumination | 15 |
| 72 | Cargo area socket | 15 |
| 73 | Diagnostic connector
Stationary heater radio remote control receiver
Valid with transmission 722.930/931:Transmission mode control unit | 5 |
| 74 | KEYLESS-GO 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 | 15 |
| 75 | Stationary heater unit
Valid as of 01.03.2013 (with Dynamic LED headlamps:
Left front lamp unit
Right front lamp unit | 20 |
| Valid for engine 156:Oil cooler fan motor relay | 25 |
| 76 | Rear cup holder
Rear center console socket
Rear USB electrical connection | 15 |
| 77 | Rear cup holder
Valid until 28.02.2013:Weight sensing system (WSS) control unit
Valid for China, South Korea vehicles:Navigation processor | 7,5 |
| 78 | Media interface control unit
Multimedia connection unit | 7,5 |
| 79 | Valid up to 31.05.2010:Radar sensors control unit
Valid as of 01.06.2010:Video and radar sensor system control unit
Valid as of 01.03.2013:Chassis gateway control unit | 5 |
| 80 | Parking system control unit | 5 |
| 81 | Cellular telephone system antenna amplifier / compensator
Mobile phone electrical connector
Navigation processor | 5 |
| 82 | Left front seat ventilation blower regulator
Right front seat ventilation blower regulator | 10 |
| 83 | Circuit 15R connector sleeve
Emergency call system control unit
Valid until 31.05.2010:Navigation processor
Japan version:Electronic Toll Collection control unit | 7,5 |
| 84 | Reversing camera power supply module
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 | 5 |
| 85 | Valid until 28.02.2015:TV tuner (analog/digital)
Valid until 28.02.2015 :Digital TV tuner
Valid as of 01.03.2015:Tuner unit | 7,5 |
| 86 | DVD player
Left rear display
Right rear display | 7,5 |
| 87 | Emergency call system control unit
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 | 7,5 |
| 88 | Valid with transmission 722.9:Intelligent servo module for DIRECT SELECT | 15 |
| 89 | Trailer recognition control unit
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 | 30 |
| 90 | Coolant circulation pump relay
Valid for engine 642.8 with BlueTEC:AdBlue® fuse block | 40 |
| 91 | Valid for transmission 722 with ECO start/stop function:Front SAM control unit with fuse and relay module | 10 |
| 92 | Valid as of 01.03.2013:KEYLESS-GO control unit
Valid as of 01.03.2013:Rear switching module
Valid until 30.11.2011:DC/AC converter control unit | 15 |
Relay
|
| A | Circuit 15 relay |
| B | Circuit 15R relay (1) |
| C | Rear window heater relay |
| D | Valid for diesel engine:Fuel pump relay |
| E | Liftgate windshield wiper relay |
| F | Seat adjustment relay |
| G | Circuit 15R relay (2) |
| No. | Fused component | A |
| MR8 | Pyrofuse, triggered by Supplemental Restraint System control unit | — |
| MR1 | Electrical power steering control unit | 50 |
| MR2 | Spare | — |
| MR3 | Spare | — |
| MR4 | Fan motor for internal combustion engine and air conditioning with integrated control | 100 |
| MR5 | Valid for diesel engine:PTC heater booster | 150 |
| MR6 | Valid for front on-board electrical system battery:Front SAM control unit with fuse and relay module | 60 |
| MR7 | Front SAM control unit with fuse and relay module | 150 |
| PIN1 | Valid for left-hand drive vehicles:Blower regulator
Valid for right-hand drive vehicles:
Electronic Stability Program control unit
Premium Electronic Stability Program control unit | 50 |
| PIN2 | Valid for right-hand drive vehicles:
Electronic Stability Program control unit
Premium Electronic Stability Program control unit | 50 |
| PIN3 | AIRmatic relay
Valid with transmission 725:Fully integrated transmission control unit | 60 |
| MRG1 | Spare | — |
| MRG2 | Front SAM control unit with fuse and relay module | 100 |
| IG1 | Rear SAM control unit with fuse and relay module | 150 |
| I1 | Valid for front on-board electrical system battery:Rear SAM control unit with fuse and relay module | 100 |
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.
FAQs
Over time, the W212 E-Class has also proven to be a generally reliable machine, capable of high mileages if well looked after. There are a few things you need to look out for when buying a used E-Class, but that's what we're here to help with. Keep reading.
How much is a Mercedes-Benz E-Class 2009? ›
Used 2009 Mercedes-Benz E-Class Pricing
| Original MSRP | KBB Fair Purchase Price (nat'l average) |
|---|
| E 350 4MATIC Sedan 4D | $52,775 | $6,832 |
| E 320 BLUETEC Sedan 4D | $53,775 | $6,706 |
| E 350 4MATIC Wagon 4D | $56,825 | $8,257 |
| E 550 Sedan 4D | $61,275 | $6,664 |
4 more rowsThe W212 and S212 Mercedes-Benz E-Class series is the fourth-generation of the E-Class range of executive cars which was produced by Mercedes-Benz between 2009 and 2016 as the successor to the W211 E-Class.
How long do Mercedes E class engines last? ›
The Mercedes C-Class is considered to have the shortest lifespan of any Mercedes model, usually hovering closer to the 150,000-200,000 mile range. On the other hand, a Mercedes Benz E-Class can have a long lifespan, edging closer and even past the 250,000 mile range.
Which Mercedes E class engine is best? ›
Nevertheless, our preferred model is the E300e PHEV. It has a 2.0-litre, four-cylinder petrol PHEV engine that generates a combined 328bhp, making it the most potent E-Class currently available. It can accelerate from 0 to 62mph in just 6.5 seconds, rivalling the performance levels of a hot hatch.
What year is the Mercedes E-Class the most reliable? ›
It is known in particular that if you are looking for a reliable Mercedes Benz E Class you should choose a 2008, 2009 or 2012 make as these are known to be some of the best at avoiding costly vehicle repairs and dodging that repair garage!
What is the life expectancy of a 2009 Mercedes E350? ›
If you are careful about all your oil changes and other maintenance, the car should be good for something between 250,000 and 300,000 miles. If you're wondering about miles per gallon, the 3.5 liter V6 should average in the low 20's with reasonable driving.
How much is a W212 Mercedes-Benz? ›
Q: What was the lowest recorded sale price for a Mercedes-Benz E350 - W212? A: The lowest recorded sale price was $8,000 for a 2010 Mercedes-Benz E350 on Jul 6 2023. Q: What is the average sale price of a Mercedes-Benz E350 - W212? A: The average price of a Mercedes-Benz E350 - W212 is $16,925.
Is Mercedes E-Class 2009 reliable? ›
Is a used Mercedes E-Class saloon reliable? This generation of E-Class Saloon lives up to its reputation where reliability is concerned. In our 2023 used car reliability survey of cars between six and 20 years old, it scored 85.3%, making it the third most reliable used luxury car on sale.
Are Mercedes E-Class expensive to maintain? ›
Mercedes-Benz maintenance costs are pretty expensive compared to other brands and drivers pay about $908 on average per year to maintain and repair their Mercedes vehicles, according to RepairPal.com.
The Manual Petrol variant has a mileage of 12.3 kmpl. The Automatic Petrol variant has a mileage of 12.3 kmpl. The Automatic Diesel variant has a mileage of 14.21 kmpl.
Which Mercedes class is best? ›
The S-Class is the flagship Mercedes-Benz vehicle. It is a full-size luxury sedan that is the epitome of luxury and refinement. The S-Class is powered by a turbocharged 3.0-liter inline-six engine that produces 429 horsepower and 384 lb-ft of torque.
What engine is in the Mercedes E-Class 2009? ›
The Mercedes-Benz E-Class 2009-2013 has 3 Diesel Engine and 4 Petrol Engine on offer. The Diesel engine is 2143 cc and 2987 cc and 2148 cc while the Petrol engine is 1796 cc and 2497 cc and 5461 cc and 3498 cc . It is available with Automatic & Manual transmission.
What year is the most reliable Mercedes E-Class? ›
It is known in particular that if you are looking for a reliable Mercedes Benz E Class you should choose a 2008, 2009 or 2012 make as these are known to be some of the best at avoiding costly vehicle repairs and dodging that repair garage!
Is the Mercedes E class good or bad? ›
Highs Sweetly smooth ride, richly refined inline-six, a cocoon of luxury inside. Lows Tech features more gimmicky than useful, finicky touch-sensitive controls, more expensive than the old model.
What is the mileage of Mercedes W212 E class? ›
Mercedes-Benz E-Class 2009-2013 mileage
The Automatic Diesel variant has a mileage of 14.21 kmpl. The Manual Petrol variant has a mileage of 12.3 kmpl. The Automatic Petrol variant has a mileage of 12.3 kmpl.
Is W212 comfortable? ›
I had a Mercedes E class (W212 2010) and I think except Mercedes S class no other car in its price range can compete with it in terms of comfort and stability at high speeds.
Jonathan Yarden Mar 25, 2021 · 5 min. read