Fuses and relays Mercedes E-Class (W212; 2009 - 2016)

The Mercedes-Benz E-Class W212 generation is represented by a wide range of bodies. The sedan (W212) was the first to go on sale in the spring of 2009. In May 2009, the E-Class coupe under the C207 index came to replace the CLK-Class coupe and convertible, and a little later, towards the end of 2009, sales of the S212 station wagon began. As a finishing touch, another member of the generation, the luxury A207 convertible, went on sale in March 2010. In this material, we will analyze in detail the fuse circuits of the fourth generation Mercedes-Benz E-class (body W212: E200, E250, E300, E350, E500): 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 model year.

general view of the car
Here you will find the locations and photos of the fuse blocks. Separately, we note the elements responsible for the cigarette lighter and fuel pump.

In the engine compartment

Locations of fuse boxes in the engine compartment of the car
The main fuse box is located near the windshield on the left side. An additional block is located near the right pillar.


Photo - an example of the execution of the main box.

Diagram
No. Relay
J Terminals 15
K Terminals 15R
L Heated wiper blades
M Terminals 50, starter
N Terminals 87, motor
O Horn relay
P Purge catalyst (272 engines)
Q Relay for additional transmission oil pump
R Relay for terminal 87, chassis
No. A Circuit breakers
1 25 ESP Premium Electronic Stability Control Module (LHD)
Regenerative Braking Control Module (LHD)
Fan Regulator (Right-Hand Drive Vehicles)
2 30 Front left door control module (up to 31.05.2010)
Rear left door control module (from 01.06.2010; vehicles with right-hand drive)
3 30 Front right door control module (up to 31.05.2010)
Rear right door control module (from 01.06.2010; vehicles with left-hand drive)
4 20 Fuel module control module (fuel pump fuse) (engine 157)
7.5 Condensate sensor control module in the fuel filter with a heating element (engine 651)
20 Condensation sensor in the fuel filter with a heating element (engines 642, 651; up to 31.05.2010)
5 7.5 Instrument cluster
Outdoor lighting parting switch
Rear SAM control module with fuse and relay module
Control unit for electronic stability control ESP (from 01.03.2013)
6 10 Vehicles with diesel engine: CDI control unit
For vehicles with petrol engine: ME control unit
Engines 271.958, 274.920 Control unit CNG
7 20 Connected via starter terminal 50 relay: Starter
8 7.5 Supplemental Restraint System control unit
9 15 Glove box socket
10 30 Wiper motor
30 Heated wiper blades
11 7.5 Audio display / COMAND
Audio control panel / COMAND
Navigation block
Holder for navigation module
Fan motor COMAND
12 7.5 Climate control system control unit
7.5 Upper Control Panel Control Module
7.5 vehicles with gearboxes 722, 724, 725: button for automatic gearbox driving mode
Valid with code 489 (AIRMATIC): Chassis pushbutton block
13 7.5 Steering column electronics control module
Multifunctional camera
Multifunctional stereo camera (from 01.03.2013)
14 7.5 ESP Electronic Stability Control Module
15 7.5 Supplemental Restraint System control module
16 5 Electric A / C Compressor
DIRECT SELECT interface (gearboxes 722.930 / 931)
Selector lever electronics control module (722 gearboxes, except 722.930 / 931)
17 30 Overhead Control Panel Control Module
Panoramic sliding sunroof control module
18 7.5 Outdoor lighting parting switch
Instrument panel switch module (up to 28.02.2013)
Upper control panel control unit (until 28.02.2013)
Relay for auxiliary transmission oil pump (722 gearboxes)
Power electronic equipment control unit
19 20 Electronic ignition switch control module
Electric steering lock control module
20 40 Electronic Stability Control (ESP) Control Module (Left Hand Drive)
Regenerative Braking Control Module (LHD)
21 7.5 Brake signal sensor (28.02.2013)
Hybrid brake light switch (28.02.2013)
Glove compartment light
Front passenger seat occupied recognition and AKSE
Weight Sensing System Control Unit
22 15 Internal combustion engine fan motor air conditioner with built-in regulation (650 W, 800 W)
Engine 156:
   Electrical connector for interior wiring harness and engine wiring
   End sleeve, terminal 87 M2e
Engines 271, 272.98, 274.9, 276 and engine 651 (except for 4MATIC system):
   Radiator louver actuator
Engines 157, 271, 272, 273, 274, 276, 278:
   Electrical connector for interior wiring harness and engine wiring
Engines 642, 651:
   CDI control unit
   Electrical connector for interior wiring harness and engine wiring
23 20 On vehicles with diesel engine: SAM with fuse and relay module in the rear of the passenger compartment
Motors 271, 642, 651: Cable gland, terminal 87 M1e
For engine 156, 157, 271, 272, 273, 274, 276, 278, 642, 651: Electrical connector for passenger compartment and engine wiring
Engine 271: ME control unit
24 15 For engine 156, 157, 271, 272, 273, 274, 276, 278, 642, 651: Electrical connector for passenger compartment and engine wiring
For vehicles with diesel engine: CDI
For vehicles with petrol engine: ME
Engines 271.958, 274.920 CNG
25 15 Engines  642, 651:
   Nitrogen oxide control unit downstream of the particulate filter
   Nitrogen oxides control unit after SCR catalytic converter
   Soot sensor control unit
For vehicles with petrol engine:
   ME control unit
Valid for vehicles type 212.095 / 098/298:
   Relay for the circulation pump of the gearbox oil cooling system
   HYBRID Power Electronics Coolant Circulating Pump Relays
Engine 156:
   End sleeve, terminal 87 M3e
26 20 Audio module
COMAND
27 7.5 Electronic ignition switch control module
For vehicles with diesel engine:
   CDI control module
For vehicles with petrol engine:
   ME control module
Engines 271.958, 274.920
   CNG control module
28 7.5 Instrument cluster
29 10 Front right headlamp (up to 28.02.2013)
30 10 Front left headlight unit (up to 28.02.2013)
31A 15 Left horn
Right horn
31B 15 Left horn
Right horn
32 40 Electric air pump
33 10 Electronic control unit for automatic transmission (gearbox 722.6)
10 Fully integrated automatic gearbox control unit (gearboxes 722.9, 724, 725)
34 7.5 Engine 156:
   Fuel pump control module
Engines  271, 272, 273, 642, 651:
   Fuel pump control module
35 7.5 Power supply relay for HYBRID control units
36 7.5 Night vision control unit
DISTRONIC (until 28.02.2013)
Front far-field radar sensor (from 01.03.2013)
COLLISION PREVENTION ASSIST (from 01.03.2013)
Additional block diagram
With ECO start / stop system
Code A Description
R8 350 Generator
Auxiliary heater control unit
MR4 100 Internal combustion engine fan motor, air conditioner with integrated regulation (650 W, 800 W)
MR5 150 On vehicles with diesel engine: Electric auxiliary heater
MR6 60 Front SAM control unit with fuse and relay module
MR7 150
MR9 - Reserve
MG2 100 Front SAM control unit with fuse and relay module
MR3 80 Electric power steering control module
IG1 150 Rear SAM control module with fuse and relay module
IM1 100
PIN1 50 Fan Regulator (Left Hand Drive)
Signals from the ESP control unit (right-hand drive vehicles)
ESP Premium Electronic Stability Control Module (Right-Hand Drive Vehicles)
PIN2 50 Signals from the ESP control unit (right-hand drive vehicles)
ESP Premium Electronic Stability Control Module (Right-Hand Drive Vehicles)
PIN3 60 Relay AIRMATIC
Fully Integrated Transmission Control Module (725 transmission)
Without ECO start / stop system
MR8 - Thermal cutout, Supplemental Restraint System control
MR1 50 Electric power steering control module
MR2 - Reserve
MR3 - Reserve
MR4 100 Cooling fan motor and integrated air conditioner (650 W, 800 W)
MR5 150 On vehicles with diesel engine : Electric auxiliary heater
MR6 60 Front SAM control unit with fuse and relay module
MR7 150
PIN1 50 Fan Regulator (Left Hand Drive)
Signals from the ESP control unit (right-hand drive vehicles)
ESP Premium electronic stability control unit (right-hand drive vehicles)
PIN2 50 Signals from the ESP control unit (right-hand drive vehicles)
ESP Premium electronic stability control unit (right-hand drive vehicles)
PIN3 60 Relay AIRMATIC
Fully integrated transmission control unit (725 transmission)
MRG1 - Reserve
MRG2 100 Front SAM control unit with fuse and relay module
IG1 150 Rear SAM control unit with fuse and relay module
I1 100
With hybrid engines
MR8 - Thermal cutout, Supplemental Restraint System control
MR4 100 Cooling Fan Motor / Integrated Air Conditioner (650W, 800W)
MR5 150 On vehicles with diesel engine: Electric auxiliary heater
MR6 60 Front SAM control unit with fuse and relay module
MR7 150
MR9 150 Fuse and relay module HYBRID
MG2 100 Front SAM control unit with fuse and relay module
MR3 80 Electric power steering control unit
IG1 150 Rear SAM control unit with fuse and relay module
IM1 100 Rear SAM control unit with fuse and relay module
PIN1 50 Fan Regulator (Left Hand Drive)
Regenerative braking control unit (right-hand drive vehicles)
PIN2 50 Regenerative braking control unit (right-hand drive vehicles)
PIN3 60 Relay AIRMATIC
Separate fuse box for hybrid models
Installation location of the additional fuse box in the engine compartment (only hybrid engines)
Located near the right headlight.

Diagram.
No. A Description
130 5 Regenerative braking system module
131 5 Battery Management System Module
132   Reserve
133 5 Power electronics control module
134 5 Vacuum pump relay (-)
135 7.5 Battery Management System Module
136 7.5 Pyrotechnic separator
137 7.5 Circulation pump 1
138 7.5 Circulation pump 2
139 7.5 Engine 651: Transmission Coolant Circulation Pump
140 40 Vacuum pump relay (+)
141 Reserve
142 Reserve
S Transmission coolant circulation pump relay
T HYBRID Control Unit Power Relay
U HYBRID Power Electronics Coolant Circulation Pump Relay

In the trunk

Location of the fuse box in the trunk of a car (sedan body)
Fuse box located on the right behind the trim (sedan).

Location of the unit in the trunk of a car (station wagon)
Behind the trim on the right (station wagon).


Photo is an example.

Diagram
No. Relay assignment
A Terminal 15 relay
B Terminal 15R (1)
C Heated rear window
D For vehicles with diesel engine: fuel module
E Tailgate wiper
F Seat adjustment
G Terminal 15R (2)
No. A Purpose of fuses
37 7.5 Solenoid coil, NECK-PRO driver's seat headrest
Solenoid coil, NECK-PRO headrest, front passenger seat
38 15 Tailgate wiper motor
39 30 Rear left door control unit (up to 31.05.2010)
Front left door control unit (from 01.06.2010; RHD)
40 - Reserve
41 30 Rear right door control unit (up to 31.05.2010)
Front right door control unit (from 01.06.2010; LHD)
42 25 Electric fuel pump relay, fuel pump fuse Mercedes 212
25 Engines 271, 272, 273, 274, 642, 651, 156, 276, 278 : fuel pump control module
43 7.5 Telecommunication services communication module
44 30 Semi-electric seat adjustment switch, front passenger
45 30 Semi-electric driver's seat adjustment switch
46 7.5 Antenna amplifier FM 1, AM, ZV and KEYLESS-GO
Valid for type 212.0 / 1:
   Rear window aerial amplifier 1
Valid for type 212.2:
   DAB III antenna
Alarm siren (H3 / 1)
Control unit for interior monitoring and anti-towing system
Valid from 01.06.2011 for engine 157, 276, 278:
   Coolant circulation pump relay
47 - Reserve
Reserve
48 -
49 40 The heated rear window relay switches on: Heated rear window
50 50 Reversible front right seat belt pretensioner
51 50 Front Left Reversible Seat Belt Pretensioner
52 - Reserve
53 30 Trailer recognition control unit
54 15
55 - Reserve
56 15 Trailer socket
57 20 Trailer recognition control unit
7.5 Valid for type 212.074 / 075/076/077/092/274/275/276/277/292:
   Front left illuminated sill trim transformer
   Sill trim transformer illuminated front right
58 25 Trailer recognition control unit
59 7.5 DiStRONIC sensor (DTR) front bumper left
DISTRONIC sensor (dTr) front bumper right
60 7.5 Pneumatic pump for multicontour seat
30 Pneumatic pump for multicontour seat with dynamic support
61 40 Control unit for boot lid actuation control
Control unit for tailgate actuation control
62 25 Driver's seat control unit
63 25 Rear seat heating control unit
64 25 Front passenger seat control unit
65 7.5 Steering wheel heating control unit (up to 28.02.2013)
10 Steering column electronic module control unit (from 01.03.2013)
66 7.5 Rear passenger compartment blower motor
67 40 Speaker amplifier control unit
68 15 AIRMATIC control unit
15 Control unit for electronic level control of the vehicle body on the rear axle
69 25 Rear Woofer Amplifier
70 5 Tire pressure monitor control unit
71 15 Front saloon socket
Cigarette lighter fuse Mercedes 212
72 15 Trunk socket 
73 5 Diagnostic connector
Auxiliary heater radio remote control receiver
Drive mode control unit (gearbox 722.930 / 931)
74 15 KEYLESS-GO
15 Valid from 01.03.2013 with code 641 (LED headlights dynamic for left-hand traffic) or code 642 (LED headlights dynamic for right-hand traffic):
   Front right headlamp
15 Valid with code 631 (LED static headlights for left-hand traffic) or code 632 (LED static headlights for right-hand traffic):
   Front left headlight block (from 01.03.2013)
   Front right headlamp
15 DC / AC converter (from 01.12.2011)
75 20 Heating device for auxiliary heater
25 Oil cooler fan motor relay (156 engines :)
20 Valid from 01.03.2013 with code 641 (LED headlights dynamic for left-hand traffic) or code 642 (LED headlights dynamic for right-hand traffic):
   Front left headlamp
20 Valid from 01.03.2013 with code 631 (LED static headlights for left-hand traffic) or code 632 (LED static headlights for right-hand traffic):
   Front left headlamp
   Front right headlamp
76 15 Cup holder in the back
Center console socket, rear
USB electrical plug connection at the rear of the vehicle
77 7.5 Weight Sensing System control unit (until 28.02.2013)
Navigation computer (China, Korea)
Cup holder in the back
78 7.5 Media interface
Multimedia device connection module
79 5 radar sensors (up to 31.05.2010)
Control unit for video sensors and radar sensors (from 01.06.2010)
Control unit for chassis data bus interface (from 01.03.2013)
80 5 Parking aid control unit
81 5 Antenna amplifier / mobile compensator
Mobile phone electrical plug connection
Navigation computer (China, Korea)
82 10 Left Front Seat Ventilation Fan Regulator
Right Front Seat Ventilation Fan Regulator
83 7.5 End sleeve, terminal 15R
Navigation computer (China, Korea)
Emergency call control unit
"Electronic Toll Collection" (Japan)
84 5 Rear view camera (from 01.03.2013)
360 ° camera control unit (from 01.03.2013)
Control unit SDAR / high-definition tuner (Satellite radio SIRIUS) (up to 31.05.2010)
Control unit Satellite Digital Audio Radio (SDAR) (Satellite radio SIRIUS) (from 01.06.2010)
Digital Sound Broadcasting Control Unit (Digital Radio (DAB)
Rear view camera control unit (Japan)
Rear View Camera Power Supply Module (Japan)
85 7.5 TV tuner (analog / digital) (until 28.02.2015)
Digital TV tuner (until 28.02.2015)
Tuner module (from 01.03.2015)
86 7.5 DVD-player
Rear display, left
Display in the rear of the passenger compartment, right
87 7.5 Emergency call control unit
Coolant circulation pump relay (from 01.06.2011; USA)
Communication module for telecommunication services (from 01.03.2015)
Multifunctional control unit for special vehicle (N26 / 14)
88 15 Servo module for automatic gearbox for DIRECT SELECT system (gearbox 722.9)
89 30 Trailer recognition control unit
Multifunctional vehicle control unit (MSS)
Fuel pump control unit (up to 28.02.2013; engine 157)
  Valid from 01.03.2013 with code 632 (LED static headlights for right-hand traffic) and code 494 (US version):
   Front right headlamp
  Valid from 01.03.2013 with code 642 (SAE dynamic LED headlights for right-hand traffic) and code 494 (US version):
   Front left headlamp
   Front right headlamp
90 40 AdBlue ® fuse box   (engine 642.8)
  Valid for type 212.076 / 276:
   Coolant circulation pump relay
91 10 Front SAM control unit with fuse and relay module (transmission 722)
92 15 KEYLESS-GO
Keyless trunk lid opening module under the rear bumper (from 01.03.2013)
AC / DC converter control unit (up to 30.11.2011)

The power board is located in the luggage compartment near the battery.

Diagram
No. A Appointment
170 - Reserve
171 60 Front SAM control unit
172 100 Rear SAM control unit
General layout of electrical equipment Mercedes W212
No. Component
1 ABS control module
2 air conditioning control module - in the heater control panel
3 Air conditioner / heater fan motor control unit - next to the heater fan motor
4 Antenna signal amplifier 1 - in the "C" rack
5 Antenna signal amplifier 2 - in the "C" post
6 Anti-theft alarm siren - behind the front right wheel arch trim
7 Additional rechargeable battery - under hollow luggage compartments
8 Additional battery - with gearshift on the steering column
9 Auxiliary battery relay - under hollow luggage compartments
10 Battery (except engine 273)
11 Battery (engine 273) - luggage compartment
12 Battery current monitoring relay (integrated with engine compartment fuse / relay box 2)
13 Trunk lid open / close drive control unit - under the rear parcel shelf
14 Diagnostic connector (DLC)
15 left front door control module
16 left rear door control module
17 right front door control module
18 rear right door control module
19 engine control module (Diesel) - engine 651
20 engine control module (Diesel) - except engine 651
21 engine control module (petrol) - engine 271
22 engine control module (petrol) - except engine 271
23 fuel pump control module - under the rear seat
24 Fuse / relay box, engine compartment 1
25 Additional fuse box under the hood
26 Passenger compartment fuse box
27 Fuse / Relay Box, Luggage Compartment 1 - Behind Right Rear Trim Panel
28 Fuse / Relay Box, Luggage Compartment 2 - Under Floor - Engine 273
29 glow plug control module
30 headlight control module, lion. (xenon headlights)
31 headlamp control module, right (xenon headlights)
32 Horn 1 - behind the front bumper
33 Horn 2 - behind the front bumper
34 ignition switch control module
35 Remote control unit for central locking and engine start - behind the right rear trim panel
36 Lighting control unit
37 Multifunction control unit 1 - Attached to engine compartment fuse / relay box 1 - Functions: A / C compressor, A / C pressure monitoring, brake fluid level, coolant level, headlights, hazard warning lights, windshield washer nozzle heaters, headlight washers, indicators turning, interior lamps, ambient temperature, windshield washer, windshield wipers
38 Multifunction control unit 2- attached to the luggage compartment fuse / relay box 1 -functions: Anti-theft system, central locking-boot lid, power seats, fuel filler flap / filler cap, rear window defroster, seat heater, taillights, rear seat head restraints, rear window blind
39 Multifunction switch control unit 1 - functions: Auxiliary heater, front seat ventilation system, front seat heater, parking system, rear head restraints, rear window blind, stop-start system
40 Multi-function switch control unit 2-functions: Air conditioning, anti-theft system, interior lamps, spotlights, sunroof
41 Ambient temperature sensor
42 parking system control module - under the rug
43 seat adjustment control module (left) - on the seat
44 seat adjustment control module (right) - on the seat
45 seat heating control module - behind the rear right trim panel
46 steering column electronics control module - under the steering wheel
47 steering column lock control module (some models)
48 sunroof control module
49 SRS electronic unit
50 suspension control module - under the mat
51 Trailer ECM - Behind Right Rear Trim Panel
52 Electronic gearbox control module (722.6) - under the rug
53 Electronic gearbox control module (722.9) - in gearbox
54 gear shift control module-selector
55 Tire Pressure Monitoring System Control Module - Above Rear Axle
56 distance control module (cruise control) - under the rug
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