[he Mercedes-Benz W211 is the third generation of the E-Class, produced from 2002 to 2009. It succeeded the W210 and was offered in two body styles: sedan (saloon) and station wagon (estate). This article provides a comprehensive guide to the fuse and relay box diagrams for the Mercedes-Benz E-Class W211 (E230 and other models) across the 2002–2009 model years.
Below you will find locations, diagrams, and photos of the fuse blocks. Fuses for critical components such as the “Cigarette lighter” and “Fuel Pump” are highlighted in bold.
Engine Compartment Fuse Box
The main underhood fuse and relay box is located on the right (driver side or passenger side depending on LHD/RHD) of the engine bay, highlighted by the red square above.
General view.
| Diagram | ||
|---|---|---|
|
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| No. | Relay Designation | |
| I | Engine management system relay | |
| K | Terminal 15 circuit relay (Main ignition 1) | |
| L | Starter motor relay | |
| M | Hydraulic pump relay (Sequentronic automated manual transmission) | |
| N | Terminal 15R circuit relay (Main ignition 2) | |
| O | Horn relay | |
| P | Terminal 15 circuit relay (Main ignition 3) | |
| R | Secondary air injection pump relay / Oil cooler fan relay | |
| S | AIRMATIC suspension compressor relay | |
| T | Vacant | |
| No. | Protected Circuit | Rating (A) |
| F53a | Horn relay | 15 |
| F53b | 15 | |
| F54a | Cigarette lighter, circuit 15R load shedding relay (to 31/05/06) | 15 |
| F54b | Cigarette lighter fuse, circuit 15R load shedding relay (from 31/05/06) | 15 |
| F43 | Engine management control unit, front SAM control unit | 15 |
| F44 | Engine Control Module (ECM) (M271, M272, M273, OM646, OM647, OM648), LPG injection control unit (M271.01 from 01/06/05) | 15 |
| F45 | Rear axle adaptive damping system control unit, electronic selector lever module (to 31/05/06) | 7.5 |
| F46 | Electronic Transmission Control (ETC) unit (Automatic / Sequentronic transmission) | 7.5 |
| F47 | ESP / ABS control module | 20 |
| F48 | Restraint Systems Control Unit (SRS), Emergency Tensioning Retractors (ETR) (from 01/06/05) | 7.5 |
| F49 | Restraint Systems Control Unit (SRS), Automatic Child Seat Recognition (ACSR), NECK-PRO head restraint solenoid relay (from 01/06/05) | 7.5 |
| F50 | Cellular telephone / Tele Aid system | 5 |
| F51 | - | |
| F52 | Electric suction fan engine cooling (from 01/06/06), instrument cluster, interior lighting switches, headlamp leveling control unit (Bi-Xenon models), exterior lamp switch module | 7.5 |
| F55 | Cellular telephone equipment | 7.5 |
| F56 | Windshield wiper motor | 40 |
| F57 | Diesel engine control unit (CDI) | 25 |
| F58 | Ignition coils (M112, M113, M156 engines) | 15 |
| F59 | Starter relay circuit (to 31/05/06) | 15 |
| F60 | Engine oil cooler fan motor (E55 AMG, E63 AMG) | 10 |
| F61 | Secondary air injection pump (M112, M113, OM642.920 engines - except E55 AMG) | 40 |
| F62 | Not used | |
| F63 | ||
| F64 | Light switch module, instrument cluster, Automatic Climate Control (ACC) panel, electronic ignition lock switch (to 31/05/06) | 7.5 |
| F65 | Electronic Ignition Switch (EIS) control unit, Steering Column Module (SCM) | 20 |
| F66 | Headlamp switch assembly | 7.5 |
| F67 | Brake light switch (Brake pedal position sensor) | 5/10 |
Passenger Compartment Fuse Boxes
There are two fuse panels inside the cabin that protect passenger compartment circuits.
Instrument Panel Fuse Box (Cockpit)
The cockpit fuse panel is located on the end-face of the dashboard on the driver side, accessible behind the cover panel.
General view of the Mercedes-Benz W211 interior fuse box.
| Diagram | ||
|---|---|---|
|
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| No. | Circuit Assignment | Rating (A) |
| F21 | Right rear door control module (to 31/05/06) | 25 |
| F22 | Right front door control module (to 31/05/06) | 30 |
| F23 | Front right power seat adjustment control module | 30 |
| F24 | KEYLESS-GO antenna & control unit - interior | 25 |
| F25 | Auxiliary heater (STH), stationary heater RF remote control receiver | 25 |
| F26 | Audio CD changer | 7.5 |
| F27 | Vacant (to 31/05/06) | |
| F28 | Audio system head unit / COMAND system | 5 |
| F29 | Steering Column Module (SCM), Electronic Ignition Switch (EIS) (from 01/06/06) | 7 |
| F30 | Diagnostic Link Connector (DLC / OBD-II) | 7.5 |
| F31 | Upper Control Panel (UCP), cockpit control switch panel (from 01/06/06) | |
| F32 | Left rear door control module (01/09/03 to 31/05/06) | 25 |
| F33 | Left front door control module (01/09/03 to 31/05/06) | 25 |
| F34 | Front left power seat adjustment control module | 30 |
| F35 | - | |
| F36 | Heated front seats control module (01/09/03 to 31/05/05) | 25 |
| F37 | AIRMATIC semi-active air suspension control unit (01/09/03 to 31/05/06) | 7.5 |
| F38 | Vacant (01/09/03 to 31/05/05) | |
| F39 | Lower Control Panel (LCP) switch group (center console) | 5 |
| F40 | Upper Control Panel (UCP) switch group (dashboard) (01/09/03 to 31/05/05) | 5 |
| F41 | Central Gateway (CGW) control module / CAN bus connector | 5 |
| F42 | Engine Control Module (ECM), engine control relay (from 01/06/05), LPG fuel system control unit, circuit 15R load disconnect relay (01/09/03 to 31/05/05), driver-side front SAM module | 7.5 |
Passenger Footwell Auxiliary Prefuse Panel
The high-current auxiliary prefuse panel is located beneath the carpeting in the passenger footwell.
| Diagram | ||
|---|---|---|
|
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| No. | Circuit Assignment | Rating (A) |
| F68 | PTC coolant booster heater (Diesel models) | 200 |
| F69 | Glow plug control module | 150 |
| F70 | Vacant (from 01/06/06) | |
| F71 | Electric radiator fan engine cooling (Diesel models) | 100 |
| F72 | SBC hydraulic unit / ABS hydraulic modulator | 50 |
| F73 | SBC control module / ABS electronic control unit | 40 |
| F74 | AIRMATIC suspension compressor relay | 40 |
| F75 | Overhead Control Panel (OCP) module | 40 |
| F76 | Supplemental Restraint System (SRS) control unit (from 01/06/06) | 40 |
| F77 | Vacant (to 31/05/06) | |
Luggage Compartment Fuse Boxes
Two fuse panels are located in the trunk: Box #1 (1) is behind the left side trunk lining, and Box #2 (2) is in the spare tire cavity. Both are indicated by red squares above.
Trunk Fuse Box #1 (Rear SAM)
General view.
| Diagram | ||
|---|---|---|
|
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| No. | Protected Circuit | Rating (A) |
| F1 | Left front power seat control unit, right front seat multicontour adjustments | 30 |
| F2 | Right front power seat control unit, left front seat multicontour adjustments | 30 |
| F3 | Navigation system unit, PARKTRONIC system control module, Tire Pressure Monitoring (TPMS) control module | 7.5 |
| F4 | Mercedes-Benz W211 Fuel pump fuse | 15 |
| F5 | - | |
| F6 | Audio system power amplifier | 40 |
| F7 | Trunk lid remote closing control unit / Tailgate control module (from 04/03) | 15 |
| F8 | Anti-theft alarm system (ATA) inclination sensor module | 7.5 |
| F9 | Sliding / tilting sunroof control module | 25 |
| F10 | Heated rear window (defroster) grid | 40 |
| F11 | Trunk lid / tailgate power closing actuator (from 04/03) | 20 |
| F12 | Luggage compartment 12V auxiliary power socket | 15 |
| F13 | Rear interior 12V power socket, multicontour seat pneumatic pump, heated rear seats (to 03/03) | 15 |
| F14 | - | |
| F15 | Fuel filler flap locking actuator relay, central locking fuel flap motor | 10 |
| F16 | Heated rear seats control module | 20 |
| F17 | Trailer recognition control module | 20 |
| F18 | Trailer socket supply | 20 |
| F19 | Multicontour seat pneumatic pump module | 20 |
| F20 | Rear window roller blind actuator motor | 7.5 |
| No. | Relay Designation | |
| A | Fuel pump relay (except E55 AMG, E63 AMG) | |
| B | Terminal 15R circuit relay (Main ignition 4) | |
| C | - | |
| D | Rear window wiper motor relay (Estate / Wagon models) | |
| E | Heated rear window relay | |
| F | Terminal 15 circuit relay (Main ignition 5) | |
| G | Fuel filler flap central locking actuator relay 1/2 | |
| H | ||
Trunk Prefuse Box #2
Located in the spare tire compartment floor.
| Diagram | ||
|---|---|---|
|
||
| No. | Circuit Assignment | Rating (A) |
| F82a | Fuel pump module (E55 AMG) | 30 |
| F82b | Secondary air injection pump | 40 |
| F78 | Engine compartment fuse and relay module (fuses F53b, F54a, F55, F63–F65, F67), front SAM control module | 200 |
| F79 | Luggage compartment fuse and relay module (fuses F3, F4, F9, F11), rear SAM control module | 200 |
| F80 | Engine compartment fuse and relay module (fuses F43, F45–F47), driver-side front SAM | 150 |
| F81 | Instrument panel cockpit fuse box (fuses F21–F42) | 150 |
| F82 | Special purpose / armored vehicle equipment | 150 |
| F83 | 30 | |
| F84 | Auxiliary battery cut-off relay | 5 |
| F85 | Voice Control System (VCS / LINGUATRONIC) control module | 5 |
| F86 | Rear interior accessory power socket (from 01/06/06) | 5 |
| F87 | Multicontour seat pneumatic pump (to 31/05/06) | 30 |
| F88 | Trunk lid / tailgate control module (Estate / Wagon models from 04/03) | 30 |
| F89 | Automatic luggage compartment cover / EASY-PACK load compartment floor (Wagon) | 40 |
| F90 | Supplemental Restraint System (SRS) control unit (from 01/06/06) | 40 |
| F91 | Vacant (from 01/06/06) | |
Overview of Vehicle Electronic Control Units
General layout and distribution of electronic control units (ECUs) in the Mercedes-Benz W211.
1. SBC / ABS hydraulic control module (to 31/05/06);
2. ESP / ABS control module (from 01/06/06);
3. Antenna amplifier module (Audio/Navigation);
4. TV tuner antenna amplifier 1 (Rear window);
5. TV tuner antenna amplifier 2 (Left rear pillar on Sedan; left D-pillar on Wagon);
6. TV tuner antenna amplifier 3 (Right rear pillar on Sedan; right D-pillar on Wagon);
7. Left front crash sensor (Behind headlamp assembly);
8. Right front crash sensor (Behind headlamp assembly);
9. Left side-impact sensor (B-pillar assembly);
10. Right side-impact sensor (B-pillar assembly);
11. Anti-theft alarm control unit (Left trunk area, integrated with Rear SAM);
12. Anti-theft alarm siren / horn (Inside wheel arch liner);
13. Automatic light/sun sensor (Top center windshield);
14. Auxiliary battery (Engine compartment, to 31/05/06, if equipped);
15. Auxiliary battery (Engine compartment, to 31/05/06, if equipped);
16. Stationary auxiliary heater control module;
17. Auxiliary heater RF remote control receiver (Right side of trunk);
18. Main vehicle battery (Under trunk floor cavity);
19. Battery Management System (BMS) control unit (Trunk compartment floor);
20. Power trunk lid / tailgate control module;
21. Central Gateway (CGW) control module / CAN gateway;
22. Data Link Connector (DLC / OBD-II port);
23. Driver door control module (Front left);
24. Rear left door control module;
25. Front passenger door control module (Front right);
26. Rear right door control module;
27. Engine Control Module (ECM - Diesel / M112 / M113);
28. Engine Control Module (ECM - M271);
29. Engine Control Module (ECM - M272 / M273);
30. Engine compartment fuse and relay box (Driver-side front SAM);
31. Cockpit / Instrument panel fuse block (Driver end-dash);
32. Passenger footwell prefuse panel;
33. Trunk fuse and relay module (Rear SAM);
34. Spare wheel cavity prefuse box;
35. Left Bi-Xenon headlamp control unit;
36. Right Bi-Xenon headlamp control unit;
37. Automatic headlamp leveling control unit (Under front passenger floor panel);
38. Dual-tone horn 1 (Behind radiator grille);
39. Dual-tone horn 2 (Behind front bumper skin);
40. Electronic Ignition Switch (EIS / EZS) control unit;
41. Immobilizer control unit (Integrated into Electronic Ignition Switch module);
42. KEYLESS-GO control unit (Behind dashboard center console / ashtray area);
43. Exterior lamp switch control module;
44. EASY-PACK load compartment floor control unit (Wagon models - under luggage deck);
45. Driver-side front SAM module (Engine bay fuse box attachment) – Controls: A/C refrigerant pressure, brake fluid level, coolant level, exterior front lighting, headlight washers, horn, interior lighting, ambient temperature sensor, windshield wipers;
46. Rear SAM module (Trunk fuse box attachment) – Controls: Anti-theft system, trunk lid release, central locking, fuel level sender, fuel pump unit, hazard warning lights, heated rear window, turn signals, tail lamps;
47. Upper Control Panel / Overhead switch unit – Controls: Anti-theft interior motion sensors, rain/sunlight sensors, interior reading lamps;
48. Cockpit switch module (Instrument panel integration) – Controls: Climate control interface, central locking toggle, hazard flasher button, rear window wiper (Wagon);
49. Center console control panel (LCP) – Controls: Auxiliary heater switch, PARKTRONIC control, AIRMATIC ride height control, trunk release button;
50. Floor panel multifunction control module – Controls: Auxiliary coolant pump, front fog lamps, seat heaters, reverse lamps, transmission gear selector lever;
51. Panoramic glass roof interior light module – Controls: Rear passenger cabin lighting;
52. Navigation system head unit / COMAND processor;
53. Ambient outside air temperature sensor;
54. PARKTRONIC system control module (Left side of luggage compartment);
55. Rain sensor (Upper center of windshield);
56. Front left power seat control unit (Under seat frame);
57. Front right power seat control unit (Under seat frame);
58. NECK-PRO active head restraint deployment relay (from 01/06/05);
59. Panorama solar roof control module (Behind instrument cluster);
60. Steering Column Module (SCM) (Behind steering wheel);
61. Electronic Steering Column Lock (ESL / ELV) unit (Integrated with Electronic Ignition Switch);
62. Steering angle sensor (Integrated into Steering Column Module);
63. Heated steering wheel control unit (Near instrument cluster, to 05/05);
64. Power sunroof control module (Integrated into Overhead Control Panel);
65. Supplemental Restraint System (SRS) control module;
66. AIRMATIC air suspension / ADS control unit (Passenger footwell under floor mat);
67. Tailgate hydraulic opening/closing actuator control module (Left trunk area);
68. Cellular phone antenna;
69. Mobile phone interface control module (Rear trunk deck floor panel);
70. Trailer recognition control module (Left side of trunk);
71. Sequentronic Transmission Control unit (Automated manual - footwell floor pan);
72. Electronic Transmission Control (ETC / 722.6 / 722.9) module (Footwell floor pan);
73. Tire Pressure Monitoring System (TPMS / RDK) module (Left side of trunk);
74. Voice Control System (LINGUATRONIC) module (Rear trunk deck floor panel);
75. Yaw rate / lateral acceleration sensor (ESC stability control).