Mercedes-Benz E-Class (W212) (2009-2016) Fuse Diagram

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Fuse box diagram (fuse layout), location, and assignment of fuses and relays Mercedes-Benz E-Class (W212; E180, E200, E220, E250, E300, E350, E400, E500 & E63 AMG) (2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016).

Checking and Replacing Fuses

The fuses in your vehicle serve to close down faulty circuits. If a fuse blows, all the components on the circuit and their functions stop operating. If a fuse has blown, the inside element will be melted. Blown fuses must be replaced with fuses of the same rating, which you can recognize by the color and value. The fuse ratings are listed in the fuse allocation chart. The fuse allocation chart is located in the vehicle tool kit in the storage compartment under the trunk/cargo compartment floor.

If a newly inserted fuse also blows, have the cause traced and rectified at a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center.

Location

Location of fuses

  • 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

Engine Compartment Fuse Box

The fuse block is located in the engine compartment on the left-hand side of the vehicle when viewed in the direction of travel.

Engine Compartment Fuse Box Location

  • Make sure that the windshield wipers are turned off.
  • Open the hood.
  • Use a dry cloth to remove any moisture from the fuse box.
  • To open: remove lines (2) from the guides.
  • Move lines (2) aside. Route the lines behind connection (3) to do this.
  • Open clamp (1).
  • Remove the fuse box cover forwards.
  • To close: check whether the rubber seal is lying correctly in the cover.
  • Insert the cover at the rear of the fuse box into the retainer.
  • Fold-down cover and close clamps (1).
  • Secure lines (2) in the guides.
  • Close the hood.

Engine Compartment Fuse Box Diagram

Fused component

A

1

Valid for left-hand drive vehicle:

25

   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

up to 31.05.2010: Left front door control unit

30

Valid for right-hand drive vehicles as of 01.06.2010: Left rear door control unit

3

up to 31.05.2010: Right front door control unit

30

Valid for left-hand drive vehicles as of 01.06.2010: Right rear door control unit

4

Valid with engine 157: Fuel system control unit

20

Valid for engine 642, 651 up to 31.05.2010: Fuel filter condensation sensor with heating element

Valid for engine 651 (with retrofitted heated fuel filter) up to 31.05.2010: Control unit for fuel filter condensation sensor with heating element

7.5

5

Instrument cluster

7.5

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

Valid for diesel engine: CDI control unit

10

Valid for gasoline engine: ME-SFI control unit

Valid for engine 271.958, 274.920: CNG control unit

7

Starter

20

8

Supplemental restraint system control unit

7.5

9

Glove compartment socket

15

10

Wiper motor

30

Wiper park position heater

11

Audio/COMAND display

7.5

Audio/COMAND control panel

Navigation module

Cradle for navigation module

COMAND fan motor

12

ACC control and operating unit

7.5

Upper control panel control unit

Valid for transmission 722, 724, 725: Automatic transmission transmission mode button

AIRMATIC: Suspension button group

13

Steering column tube module control unit

7.5

Multifunction camera

Stereo multifunction camera

14

Electronic Stability Program control unit

7.5

Premium Electronic Stability Program control unit

15

Supplemental restraint system control unit

7.5

16

Hybrid: Electrical refrigerant compressor

5

Valid with transmission 722.930/931: DIRECT SELECT INTERFACE

Valid for transmission 722 (except 722.930/931): Electronic selector lever module control unit

17

Overhead control panel control unit

30

Panoramic sliding roof control module

18

Exterior lights switch

7.5

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

Valid except transmission 722.9:

20

   Electronic ignition lock control unit

   Electric steering lock control unit

20

Valid for left-hand drive vehicle:

40

   Electronic Stability Program control unit

   Premium Electronic Stability Program control unit

Valid for left-hand drive vehicle, Hybrid: Regenerative braking system control unit

21

Front passenger seat occupied recognition and ACSR

7.5

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

Valid for fan motor with 650, 800 W: Fan motor for internal combustion engine and air conditioning with integrated control

15

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

Valid for diesel engine: Rear SAM control unit with fuse and relay module

20

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

Valid for engine 156, 157, 271, 272, 273, 274, 276, 278, 642, 651: Electrical connector for interior harness and engine wiring harness

15

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

Valid for engine 642, 651 with BlueTEC:

15

   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

Radio

20

Radio with auto pilot system

COMAND controller unit

27

Valid for gasoline engine: ME-SFI control unit

7.5

Valid for diesel engine:

   CDI control unit

   Electronic ignition lock control unit

Valid for engine 271.958, 274.920: CNG control unit

28

Instrument cluster

7.5

29

Valid up to 28.02.2013: Right front lamp unit

10

30

Valid up to 28.02.2013: Left front lamp unit

10

31A

Left fanfare horn

15

Right fanfare horn

31B

Left fanfare horn

15

Right fanfare horn

32

Valid for engine 272: Electric air pump

40

33

Valid for transmission 722.6: Electronic transmission control control unit

10

Valid for transmission 722.9, 724, 725: Fully integrated transmission control controller unit

34

Valid for engine 156, 271, 272, 273, 642, 651: Fuel system control unit

7.5

35

Hybrid: HYBRID control unit power supply relay

7.5

36

Night View Assist control unit

7.5

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

HYBRID fuse and relay module

HYBRID fuse and relay module

Fused component

A

130

Regenerative braking system control unit

5

131

Battery management system control unit

5

132

Spare

-

133

Power electronics control unit

5

134

Vacuum pump relay (-)

5

135

Battery management system control unit

7.5

136

Pyrotechnical separator

7.5

137

Power electronics circulation pump 1

7.5

138

Power electronics circulation pump 2

7.5

139

Valid for engine 651: Transmission cooling coolant circulation pump

7.5

140

Vacuum pump relay (+)

40

141

Spare

-

142

Spare

-

Relay

S

Transmission cooling coolant circulation pump relay

T

HYBRID control unit power supply relay

U

HYBRID power electronics coolant circulation pump relay

Front electrical prefuse box

Front electrical prefuse box

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

50

Valid for right-hand drive vehicles:

   Electronic Stability Program control unit

   Premium Electronic Stability Program control unit

PIN2

Valid for right-hand drive vehicles:

50

   Electronic Stability Program control unit

   Premium Electronic Stability Program control unit

PIN3

AIRmatic relay

60

Valid with transmission 725: Fully integrated transmission control unit

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

with ECO start/stop

Front electrical prefuse box (with ECO start/stop)

Fused component

A

MR8

Alternator

350

Stationary heater control unit

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

MR9

Spare

-

MG2

Front SAM control unit with fuse and relay module

100

MR3

Electrical power steering control unit

80

IG1

Rear SAM control unit with fuse and relay module

150

IM1

Valid for front on-board electrical system battery: Rear SAM control unit with fuse and relay module

100

PIN1

Valid for left-hand drive vehicles: Blower regulator

50

Valid for right-hand drive vehicles:

   Electronic Stability Program control unit

   Premium Electronic Stability Program control unit

PIN2

Valid for right-hand drive vehicles:

50

   Electronic Stability Program control unit

   Premium Electronic Stability Program control unit

PIN3

AIRmatic relay

60

Valid with transmission 725: Fully integrated transmission control unit

Hybrid

Front electrical prefuse box (Hybrid)

Fused component

A

MR8

Pyrofuse, triggered by Supplemental Restraint System control unit

-

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

MR9

HYBRID fuse and relay module

150

MG2

Front SAM control unit with fuse and relay module

100

MR3

Electrical power steering control unit

80

IG1

Rear SAM control unit with fuse and relay module

150

IM1

Valid for front on-board electrical system battery: Rear SAM control unit with fuse and relay module

100

PIN1

Valid for left-hand drive vehicles: Blower regulator

50

Valid for right-hand drive vehicles: Regenerative braking system control unit

PIN2

Valid for right-hand drive vehicles: Regenerative braking system control unit

50

PIN3

AIRmatic relay

60

Luggage Compartment Fuse Box

It is in the trunk/cargo compartment on the right-hand side of the vehicle, when viewed in the direction of travel.

Sedan

Luggage Compartment Fuse Box Location

  • Open the trunk lid.
  • To open: release cover (1) at the top right and left-hand sides with a flat object.
  • Open the cover (1) downwards in the direction of the arrow.

Wagon

Luggage Compartment Fuse Box Location

  • Open the tailgate.
  • To open: pull handle (1) on the cover.
  • Open the cover downwards.
  • Swing trim (2)

Luggage Compartment Fuse Box Diagram

Fused component

A

37

Driver seat NECK-PRO head restraint solenoid

7.5

Front passenger seat NECK-PRO head restraint solenoid

38

Valid for model 212.2: Tailgate wiper motor

15

39

up to 31.05.2010: Left rear door control unit

30

Valid for right-hand drive vehicles as of 01.06.2010: Left front door control unit

40

Spare

-

41

up to 31.05.2010: Right rear door control unit

30

Valid for left-hand drive vehicles as of 01.06.2010: Right front door control unit

42

Fuel pump relay

25

Valid for engine 156, 271, 272, 273, 274, 276, 278, 642, 651: Fuel system control unit

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

7.5

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

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

7.5

Right front illuminated door sill molding voltage converter

58

Trailer recognition control unit

25

59

Left front bumper DISTRONIC (DTR) sensor

7.5

Right front bumper DISTRONIC (DTR) sensor

60

Multicontour seat pneumatic pump

7.5

Dynamic multicontour seat pneumatic pump

30

61

Trunk lid control control unit

40

Tailgate control control unit

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

15

Rear axle electronic level control control unit

69

Rear bass speaker amplifier

25

70

Tire pressure monitor control unit

5

71

Vehicle interior socket, front

15

Front cigarette lighter with ashtray illumination

72

Cargo area socket

15

73

Diagnostic connector

5

Stationary heater radio remote control receiver

Valid with transmission 722.930/931: Transmission mode control unit

74

KEYLESS-GO control unit

15

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

75

Stationary heater unit

20

Valid as of 01.03.2013 (with Dynamic LED headlamps:

   Left front lamp unit

   Right front lamp unit

Valid for engine 156: Oil cooler fan motor relay

25

76

Rear cup holder

15

Rear center console socket

Rear USB electrical connection

77

Rear cup holder

7.5

Valid until 28.02.2013: Weight sensing system (WSS) control unit

Valid for China, South Korea vehicles: Navigation processor

78

Media interface control unit

7.5

Multimedia connection unit

79

Valid up to 31.05.2010: Radar sensors control unit

5

Valid as of 01.06.2010: Video and radar sensor system control unit

Valid as of 01.03.2013: Chassis gateway control unit

80

Parking system control unit

5

81

Cellular telephone system antenna amplifier / compensator

5

Mobile phone electrical connector

Navigation processor

82

Left front seat ventilation blower regulator

10

Right front seat ventilation blower regulator

83

Circuit 15R connector sleeve

7.5

Emergency call system control unit

Valid until 31.05.2010: Navigation processor

Japan version: Electronic Toll Collection control unit

84

Reversing camera power supply module

5

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

85

Valid until 28.02.2015: TV tuner (analog/digital)

7.5

Valid until 28.02.2015 : Digital TV tuner

Valid as of 01.03.2015: Tuner unit

86

DVD player

7.5

Left rear display 

Right rear display

87

Emergency call system control unit

7.5

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

88

Valid with transmission 722.9: Intelligent servo module for DIRECT SELECT

15

89

Trailer recognition control unit

30

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

90

Coolant circulation pump relay

40

Valid for engine 642.8 with BlueTEC: AdBlue fuse block

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

15

Valid as of 01.03.2013: Rear switching module

Valid until 30.11.2011: DC/AC converter control unit

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)

Rear prefuse box

Rear prefuse box

Fused component

A

170

Reserve

-

171

Front SAM control module with fuse and relay module

60

172

Rear SAM control unit with fuse and relay module

100

AdBlue fuse block

AdBlue fuse block

Fused component

A

19

AdBlue control unit

15

20

AdBlue control unit

20

21

AdBlue control unit

7.5

22

AdBlue control unit

5

Other relays

Oil cooler fan motor relay (engine 157)

Oil cooler fan motor relay

Other relays

  • 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)

Other relays

  • 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)
Tóm tắt
The article provides detailed information about the fuse box diagram, location, and assignment of fuses and relays for the Mercedes-Benz E-Class (W212) models from 2009 to 2016. It explains the importance of fuses in protecting electrical circuits and outlines the procedure for checking and replacing blown fuses, emphasizing the need to use fuses of the same rating. The fuse allocation chart is found in the vehicle's tool kit. The article also describes the locations of various fuse boxes, including the front and rear prefuse boxes and the engine compartment fuse box. Instructions for accessing the engine compartment fuse box are provided, including safety precautions like ensuring the windshield wipers are off. A detailed list of fuses, their ratings, and the components they protect is included, covering various systems such as the electronic stability program, fuel system control, and audio systems. The article serves as a comprehensive guide for E-Class owners to manage their vehicle's electrical systems effectively.