Mercedes-Benz 211: fuses and relays

The Mercedes-Benz 211 body is the third generation of E-class cars, which were produced in 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 with gasoline and diesel engines (E200, E220, E230, E240, E270), E280, E300, E320, E350, E400, E420, E500, E55 and E63 AMG), as well as the w211 sedan and the S211 station wagon. During this time, the model has been redesigned. In this material, we will show the location of all electronic control units, a description of the fuses and relays of the Mercedes 211 with block diagrams and photo examples of their execution. Select the fuse for the cigarette lighter.

The location of the blocks and the purpose of the elements on them may differ from those shown and depend on the year of manufacture and the level of electrical equipment of your car.

Location

General arrangement of blocks

Description

one	ABS electronic control unit —> 31.05.06
two	ABS electronic control unit - 01.06.06^
3	Antenna Amplifier - Audio/Navigation System
4	Aerial amplifier 1 (TV tuner) - rear window
5	Aerial Amplifier 2 (TV Tuner) - Left C-pillar (Saloon) - Left C-pillar (Pickup)
6	Aerial amplifier 3 (TV tuner) - right speaker C (sedan) - right speaker C (station wagon)
7	Crash sensor on the left behind the headlight
eight	Crash sensor right behind the headlight
nine	Side Impact Sensor Assembly, LH - B-pillar
ten	Side impact sensor assembly, right side - B-pillar
11	Left trunk anti-theft control unit (integrated with multifunction control unit 2)
12	Anti-theft horn - behind wheel arch trim
thirteen	Sunlight sensor - top center of windshield
14	Additional battery -> 31.05.06 if available
fifteen	Additional battery -> 31.05.06 if available
sixteen	Additional heating control unit
17	Auxiliary heater remote control receiver - right side of luggage compartment
Eighteen	Battery - under the trunk floor
nineteen	Battery control unit - trunk, bottom
twenty	Trunk opening/closing control unit
21	CAN data bus, gateway control unit
22	Diagnostic connector (DLC)
23	Left front door control unit
24	Rear left door electric control box
25	Front right door electric control box
26	Rear right door electric control unit
27	Electronic engine control unit - diesel / 112/113
28	Electronic engine control unit - 271
29	Electronic engine control unit - 272/273
30	Fuse / relay box, engine compartment
31	Fuse/Relay Box
32	Fuse/relay box in footwell
33	Fuse/Relay Box, Trunk
3. 4	Spare wheel fuse/relay box
35	Left headlight control unit (models with xenon headlights)
36	Right headlight control unit (models with xenon headlights)
37	Headlight range control unit - under the right front seat, under the carpet (models with xenon headlights)
38	Speaker 1 - Behind the bars
39	Horn 2 - behind the front bumper
40	Ignition lock control unit
41	Electronic immobilizer control unit (combined with ignition lock control unit)
42	Keyless entry system control unit - behind the ashtray
43	Lighting control unit - behind the headlight switch
44	Trunk Loading Control Unit (Van) - For Hollow Barrels
Four five	Multifunction Control Module 1 - Connected to Engine Compartment Fuse/Relay Box - Functions: A/C Pressure Control, Brake Fluid Level, Coolant Level, Headlights, Headlight Washers, Horns, Interior Lights, Outside Temperature, Wiper Washer
46	Multifunction control unit 2 connected to fuse/relay box, trunk - Functions: anti-theft system, trunk/trunk lid release, central locking, fuel level, fuel pump, alarm, heated rear window, turn signals, rear lighting
47	Multifunction control unit 3 - in the multifunction switch control unit (overhead console) - functions: volume change sensors (anti-theft system), sunlight sensor, interior lighting sensor, rain sensor
48	Multi-function control unit 4-V multi-function switch control unit (dashboard) - functions: air conditioning control unit, central locking, alarm, rear wiper
49	Multifunction Control Unit 5" Multifunction Switch Control Unit (Center Console) - Functions: Auxiliary Heater Switch, Parking Assist, Active Suspension System, Tailgate/Trunk Lid Switch
50	Multifunction control unit 6 - Footwell, under carpet - Functions: Coolant pump motor, fog lights, heated seats, reversing lights, gear selector
51	Multifunction control unit 7 - in rear interior lighting (with transparent roof) - functions: interior lighting
52	Navigation system control unit
53	Room temperature sensor
54	Parking control module - left side of trunk
55	Rain sensor - top center of windshield
56	Power seat control unit, front left - under the seat
57	Power seat control unit, front right - under the seat
58	Header relay (06.01.05^)
59	Solar control unit - behind the instrument cluster
60	Steering column electric control unit - behind the steering wheel
61	Steering column lock control unit - built into the ignition lock control unit
62	Steering wheel position sensor - in the steering column electrical control unit
63	Heated steering wheel control unit - near instrument cluster (^05/05)
64	Power sunroof control box - in multifunction switch control box (overhead console)
sixty five	SRS electronic control unit
66	Active Suspension Control Module - Footwell, Under Mat
67	Tailgate Open/Close Control Module - Left Side of Tailgate
68	telephone antenna
69	Telephone interface control unit - under the panel, in the rear of the trunk
70	Trailer Electrical Control Module - LH Trunk
71	Electronic transmission control unit (sequential manual transmission) - footwell, floor mat
72	ECM - footwell, floor mat
73	Tire pressure monitoring control unit - luggage compartment left side
74	Voice control unit - under the panel, in the rear of the trunk
75	Lateral motion sensor

Block under the hood

Under the hood, the main fuse and relay box is located on the left side, next to the frame, and is covered by a protective cover.

scheme

designation

43	15A Control unit ME (engines 112, 113, 156, 271, 272, 273)
CDI system control unit (engines 628, 629, 642, 646, 647, 648)
SAM control unit with rear relay and fuse box (engines 629, 642, 646, 647, 648)
SAM control unit with relay module and fuses on the driver's side (engines 629, 642)
44	15A CDI system control unit (engines 646, 647, 648)
ME control unit (engines 271, 272, 273)
Gas supply valve cyl. 1 (engine 271 CNG)
Gas supply valve cyl. 2 (engine 271 CNG)
Gas supply valve cyl. 3 (engine 271 CNG)
Gas supply valve cyl. 4 (engine 271 CNG)
Four five	AIRmatic 7.5A control unit with ADS system
Rear axle body level control unit
Selector Lever Electronic Module Control Unit (5-Speed ​​Automatic Transmission (NAG))
Selector lever position sensor (Sequentronic Semiautomatic (ASG))
46	7.5A EGS control unit (5-speed automatic transmission (NAG))
Semi-automatic transmission control unit (Sequentronic (ASG))
Electric control unit VGS (7-speed automatic transmission)
47	5A Control unit for ESP, PML and BAS systems
48	SRS control unit 7.5A
Front left reversible seat belt pretensioner (2007 to present)
Reversible right front seat belt pretensioner (2007 to present)
49	SRS control unit 7.5A
Passenger/Child Seat Recognition Sensor, Front Passenger Seat
Headrest relay NECK-PRO
50	Mobile phone circuit with 5A electrical connector
VICS Power Off Point (Japan)
Emergency call system control unit (since 2007; USA)
51	5A Not used
52	Rotary switch outdoor lighting 7,5A
Tool combination
Glove box lighting with microswitch
Headlight range control unit (bi-xenon headlights)
Engine and A/C intake fan with built-in regulator (since 2007)
53 place	Not used
53б	15A Horn relay
54-th	15A Illuminated cigarette lighter
54б	15A Illuminated cigarette lighter
55	Telephone 7,5A (standard telephone "MB")
Bluetooth module plug connection (standard telephone "MB")
Mobile phone electrical connector circuit
Emergency call system control unit (since 2007; USA)
56	Wiper motor 40A (M6/1)
57	25A CDI system control unit (engines 628, 646, 647, 648)
Suction electric fan for engine and air conditioner with built-in regulator (engines 271, 272, 273)
Me control unit (engines 271, 272, 273)
Reversing regeneration valve (engines 271, 272, 273)
PremAir system sensor (engines 271, 272, 273)
Vessel Stop Valve (USA)
58	15A Engines 112, 113, 156:
Ignition coil 1 cylinder
Ignition coil 2 cylinder
Ignition coil 3 cylinder
Ignition coil 4 cylinder
Ignition coil 5 cylinder
Ignition coil 6 cylinder
Ignition coil 7 cylinder
Ignition coil 8 cylinder
59	Starter relay 15/20A
60	10A Oil cooler fan (E55 AMG, E63 AMG)
61	Electric air pump 40A
62	30A ASG pump control relay (Sequentronic (ASG) semi-automatic transmission)
63	15A Semi-automatic gearbox control unit (Sequentronic Semi-automatic Gearbox (ASG))
Terminal 87 relay, motor (motors 112, 113)
ME control unit (engines 112, 113)
64	Rotary switch outdoor lighting 7,5A
Tool combination
Steering column electronic module (until 2007)
UAC control panel
sixty five	Control unit 20A EZS
Electric steering lock control unit
66	7,5A Right headlight
Left headlight
Dial LWR (since 2007)
Headlight range adjustment module (bi-xenon headlights)
67	Stoplight switch 5/10A
Relay
Я	Terminal 87 relay, motor
К	Relay, electrical terminal circuit 87 undercarriage
Л	Starter relay
METER	ASG pump control relay (until 2007)
North	Relay terminal 15
OR	Horn relay
П	Relay terminal 15R
Р	Air pump relay (except engines 113.990 (E55 AMG), 156.983 (E63 AMG))
Oil cooler fan relay (engine 113.990 (E55 AMG), 156.983 (E63 AMG))
Yes	AIRMATIC relay (semi-active air suspension)
Т	Isolating relay for disconnected consumers (until 2007)

Fuse number 54 is responsible for the front cigarette lighter, all other fuses are located in the trunk blocks.

Blocks in the salon

Block in the dashboard

On the left side of the instrument panel under the protective cover is the fuse box.

Photo - example

scheme

Goal

150A Power Supply: Rear Feed Fuse Box
21	25/30A Rear right door control unit
22	Right front door control unit
23	30A Seat adjustment control unit with front passenger memory function
24	Wire terminal 25A Terminal 30, Keyless-Go
25	Auxiliary heater 25A protected by cable lug: (STH heater)
5A Additional protection via auxiliary heater switch fuse:
Receiver unit for radio remote control of the auxiliary heater STH
26	CD changer 7,5A
27	Relay 5A terminals 15 (since 2007)
28	Audio system 5A
Control panel with display system COMAND (Japan)
Control panel for the audio module and navigation box 15A (Audio 50 APS)
Control panel 15A with COMAND system display
29	15A Electrical cable lugs 30 circuits
15 A DC/DC converter control unit (until 2003)
Steering column electronic module El7.5
Control unit 7,5A EZS
30	Diagnostic connector 7,5 A
31	5A Upper control box
Separating relay 5A for disconnected consumers (2006)
SAM 7.5A control unit with relay module and driver's side fuses (until 2006)
32	25/30А Switchboard rear single-door left
33	25/30A Left front door control unit
3. 4	30A Driver seat adjustment control unit with memory function
35	5A Passenger Weight System (WSS) control unit (since 2007; USA)
36	25A Control unit for heated and ventilated seats
37	Control unit AIRmatic 7,5/15A with ADS system
38	Headrest relay 7.5A NECK-PRO
39	5A Control box Lower control box
40	5A Upper control unit (until 2006)
10A Control unit for heated and ventilated seats
41	5A Central interface control unit
42	7,5A Isolating relay for disconnected consumers (until 2006)
ME control unit (engines 112, 113)
Terminal 87 relay, motor (motors: 629, 642, 646 EVO)
SAM control unit with relay module and driver side fuses (271, 272, 628, 629, 642, 646, 647, 648 engines)
CNG control unit (engine 271)

Block under the dashboard

This fuse box is located in the front passenger footwell. To access it is necessary to remove the casing and protective cover.

scheme

transcribed

68	Additional heater 200A (engines 629, 642, 646, 647, 648)
69	Glow 150A output stage (646, 647, 648 motors)
150 A spark plug timeout (629, 642, 646 engines)
70	Secondary Battery Relay 150A
Starting the engine from an external power source (since 2007; type 211.2)
71	A/C motor 100A and vacuum with integrated regulator (motors 112, 113, 156, 271, 272, 273, 629, 642, 646, 647, 648)
72	Hydraulic block SBC 50A
73	Hydraulic block SBC 40A
40A ESP control unit (since 2007)
74	Relay AIRMATIC 40A
75	40A Passenger side SAM control unit
76	Catalyst purge relay 40A (2003; engines 113.990 (E55 AMG))
40A Reversible Right Front Pretensioner (PRE-SAFE)
77	40A Heater recirculation unit
Solar generator control unit
Fan motor (since 2007)

Blocks in the trunk

Block behind the upholstery

On the left side of the trunk, behind the trim, is a fuse and relay box.

scheme

Description

one	30A Passenger side partially electric seat adjustment switch
Driver's seat adjustment control unit with memory function
two	30A Power seat partial adjustment switch, driver's side
Seat adjustment control unit with front passenger memory function
3	7.5A RDK control unit (tire pressure monitoring system)
PTS control unit (parktronic)
TV tuner (analog/digital)
Navigation processor
4	Fuel pump 15/20A (except 113 990 (E55 AMG), 156 983 (E63 AMG))
Charge air cooler circulation pump 7,5/15A (113.990 (E55 AMG))
5	Not used
6	40A Audio interface control unit
Antenna amplifier module, left
Audio system
7	15A Rear door control unit
eight	Antenna amplifier module 7,5A left
Tilt sensor EDW
Sound alarm
nine	25A roof control panel
ten	Heated rear window 40A
11	20A Rear door control unit
12	15A socket in the trunk
thirteen	15A socket in the living room
14	Not used
fifteen	10A Fuel tank cap of the central locking drive
sixteen	20A Control unit for heated and ventilated seats
17	20A AAG control unit (drawbar)
Eighteen	20A AAG control unit (drawbar)
nineteen	20A Air pump for multicontour seat
twenty	7.5A Rear window blind relay
Relay
AN	Fuel pump relay (except engines 113.990 (E55 AMG), 156.983 (E63 AMG))
Charge air cooler circulation pump relay (only for engine 113.990 (E55 AMG))
Б	Relay 2, terminal 15R
С	Backup relay 2
Д	Rear Wiper Relay
Me	Heated rear window relay
Ф	Relay 1, terminal 15R
GRAM	Fuel cap relay, polarity reversal 1
TIME	Gas cap relay, polarity switch 2

Block next to the battery

Another high power fuse box is installed next to the battery.

scheme

designation

78	SAM 200A control unit with driver side fuse relay module
79	SAM 200A control unit with rear relay and fuse box
80	SAM 150A control unit with driver side fuse relay module
81	Internal fuse box 150A
82	150A Fuse box II, rear right wheel arch (service vehicles)
150A Fuse 82A and 82B (Engines 113.990 (E55 AMG), 156.983 (E63 AMG))
82А	30A Fuel pump relay (engine 113.990 (E55 AMG))
40A Fuse for the fuel pump control unit, left (engine 156.983 (E63 AMG))
40A Fuel pump control unit fuse, right (engine 156.983 (E63 AMG))
82B	Catalyst Purge Relay 40A
83	30A Multifunction control unit Car Spec (MSS) (taxi)
84	5A Battery control unit
Battery sensor
85	5A telephone interface
Hands-free system control unit
Voice Control Unit
UHI control unit (universal mobile phone interface)
86	Interior socket (5A until 2003, 30A from 2004-2007, 5A from 2007)
5A SDAR control unit (since 2007; USA)
30A Multifunctional control unit spec. Vehicles (MCS) (company cars, taxis)
30A GAS control unit (service vehicles)
30A Wire connector, terminal 30/inside (company vehicles)
87	40A air pump for dynamic seat adjustment
88	Control unit 30A HDS (type 211.0)
Tailgate lock control unit (type 211.2)
89	40A Luggage compartment floor control unit (type 211.2)
90	40A Front left reversible pretensioner (PRE-SAFE)
Specifications of the multifunctional vehicle control unit (MCU) (taxi)
30A Fuel pump relay (up to 2004; engine 113.990 (E55 AMG))
91	40A Multifunction control unit Car Spec (MSS) (taxi)

That's all. And if you have something to add, write in the comments.