Rear Fuse Box Location in 2007 Mercedes S550 Trunk
Rear Fuse Box Location in 2007 Mercedes S550 Trunk

2007 Mercedes S550 Fuse Box Diagram: Location and Guide

Maintaining the electrical system of your 2007 Mercedes S550 is crucial for its overall performance and longevity. A key component of this system is the fuse box, which protects your vehicle’s electrical circuits from damage caused by overloads. Understanding the location and function of each fuse within the fuse box is essential for troubleshooting electrical issues. Unlike some vehicles with a single fuse box, the 2007 Mercedes S550 is equipped with four distinct fuse boxes, each serving different areas of the car. This guide will help you locate these fuse boxes and understand their diagrams, ensuring you can effectively diagnose and resolve any fuse-related problems in your Mercedes S550.

To properly address any electrical concerns, knowing where each fuse box is situated is the first step. The 2007 Mercedes S550 has strategically placed fuse boxes in the instrument panel (both left and right sides), the rear of the vehicle, and the engine compartment. Each of these locations houses fuses that control specific systems and components of your car. By familiarizing yourself with these locations and their corresponding diagrams, you can save time and effort when diagnosing electrical faults. Below, we provide a detailed overview of each fuse box location and its diagram to assist you in maintaining your 2007 Mercedes S550.

Instrument Panel Fuse Box [Left] Diagram

The first fuse box is located within the instrument panel on the left-hand side of the vehicle. Accessing this fuse box typically involves removing a cover panel, often found at the end of the dashboard, visible when the driver’s door is open. This fuse box primarily manages circuits related to interior functions and convenience features within the car.

Type No. Description
Fuse ATO 40A 92 Left front seat control unit
Fuse ATO 7.5A 93 Restraint systems control unit USA version: Weight Sensing System (WSS) control unit
Fuse ATO 5A 94 from 2009: Multifunction camera
Fuse ATO 5A 96 Tire pressure monitor [RDK] control unit
Fuse ATO 7.5A 97 W221: Audio/video controller control unit (rear entertainment system)
Fuse ATO 7.5A 98 Rear entertainment system: DVD player (from 2009)
Fuse ATO 7.5A 99 from 2009: COMAND display, SPLITVIEW display
Fuse ATO 5A 100 from 2009: Media interface control unit
Fuse ATO 10A 101 Rear entertainment system: Left rear display, Right rear display
Fuse ATO 40A 102 Right front seat control unit
Fuse ATO 7.5A 103 ESP control unit
Fuse ATO 40A 104 Audio tuner control unit
Fuse ATO 1A 106 Japanese version: Electronic toll collection (ETC) control unit Valid for South Korea as of 1.9.10: TV/tuner connector Valid for navigation; from 2009: Navigation processor
Fuse ATO 5A 107 SDAR control unit (SIRIUS satellite radio) (W221 from 2009) Digital radio: Digital Audio Broadcasting control unit HD radio: High definition tuner control unit
Fuse ATO 5A 108 W221: Rear air conditioning control unit
Fuse ATO 15A 109 W221: Rear blower intermediate connector
Fuse ATO 7.5A 110 W221: Left rear multicontour backrest control unit, Right rear multicontour backrest control unit
Fuse ATO 5A 111 Rear multicontour seat or rear entertainment system (model 221): RCP [HBF] control unit
Fuse ATO 5A 112 W221; up to 2008: Left front door control unit, Right front door control unit S 400 Hybrid: Front SAM control unit with fuse and relay module
Fuse ATO 5A 113 S400 Hybrid: DC/DC converter control unit

Instrument Panel Fuse Box [Right] Diagram

Similar to the left side, the right side of the instrument panel also houses a fuse box. This is typically accessed in the same manner as the left side, by removing a cover panel at the end of the dashboard when the passenger door is opened. This fuse box, like its counterpart, manages various interior electrical functions, potentially including passenger-side specific features and shared systems.

Type No. Description
Fuse ATO 40A 70 C216: Right door control unit W221: Right front door control unit
Fuse ATO 15A 71 Keyless Go control unit
Fuse ATO 7.5A 72 S 400 Hybrid: Pyrotechnical separator
Fuse ATO 5A 73 Japanese version: COMAND controller unit TELE AID emergency call system (from 2009): Emergency call system control unit
Fuse ATO 30A 74 TLC [HDS] control unit (Remote trunk closing)
Fuse ATO 10A 75 S 400 Hybrid: Battery management system control unit, Power electronics control unit
Fuse ATO 15A 76 S 400 Hybrid: Vacuum pump relay (+)
Fuse ATO – 77 Advanced Sound system
Fuse ATO 25A 78 S 65 AMG with engine 275: Additional fan relay (from 2009) Valid for model 221 with engine 642.8: AdBlue relay supply (from 2009)
Fuse ATO 15A 78 S 400 Hybrid, CL 63 AMG with engine 157, 278: Charge air cooler circulation pump (from 2009)
Fuse ATO 7.5A 79 Alarm signal horn with additional battery
Fuse ATO 40A 80 C216: Left door control unit W221: Left front door control unit
Fuse ATO 30A 81 C216: Rear control unit
Fuse ATO 40A 81 W221: Left rear door control unit
Fuse ATO 30A 82 C216: Rear control unit
Fuse ATO 40A 82 W221: Left rear door control unit
Fuse ATO 30A 83 Intelligent servo module for DIRECT SELECT
Fuse ATO 20A 84 Advanced sound system: Digital sound processor (from 2009)
Fuse ATO 10A 85 Valid for AMG: Illuminated door sill moldings (from 2009)
Fuse ATO 20A 90 Stationary heater: STH heater unit (C216), STH or HB heater unit (W221)
Fuse ATO 5A 91 Stationary heater: STH radio remote control receiver S 400 Hybrid: Front SAM control unit with fuse and relay module

Rear Fuse Box Diagram

Moving to the rear of the vehicle, the rear fuse box in the 2007 Mercedes S550 is typically located in the trunk or luggage compartment. Its exact placement can vary slightly but is often behind a trim panel on one side of the trunk. This fuse box is responsible for circuits powering rear vehicle systems, including lighting, trunk functions, and potentially rear passenger amenities.

Type No. Description
Fuse MAXI 50A 115 Heated rear window
Fuse ATO 10A 116 Valid for engine 157, 275, 278: Charge air cooler circulation pump Valid for engine 156: Engine coolant circulation pump S 400 Hybrid: Power electronics circulation pump 2
Fuse ATO 15A 117 Rear cigar lighter
Fuse ATO 30A 118 Valid for engine 272, 273, 642: Fuel pump (up to 2008) Valid for model 221 with engine 629, 642: Fuel pump (from 2009)
Fuse ATO 15A 118 S 400 Hybrid: Power electronics circulation pump 1 Valid for model 642.8 and engine 651 as of 1.6.11: Refrigerant compressor with magnetic
Fuse ATO 7.5A 119 Front central operating unit
Fuse ATO 10A 121 Audio tuner control unit
Fuse ATO 7.5A 122 COMAND controller unit
Fuse MAXI 40A 123 W221: Right front reversible emergency tensioning retractor
Fuse MAXI 40A 124 W221: Left front reversible emergency tensioning retractor
Fuse ATO 5A 125 up 31.5.09: Voice control system (VCS) control unit
Fuse ATO 25A 126 Overhead control panel control unit
Fuse ATO 30A 127 Lumbar pump (from 2009) Multicontour seat pneumatic pump (Left/right front multicontour seats) Pneumatic pump for dynamic seat control (Left and right dynamic multicontour seat)
Fuse ATO 25A 128 Valid for engine 275 (up to 2008): Fuel pump control unit Valid for engine 156, 157, 272, 273, 275, 276, 278, 642 (from 2009): Fuel pump control unit
Fuse ATO 25A 129 up to 2008: Overhead control panel control unit (Power glass tilting/sliding roof) from 2009: UPCI (Universal Portable Cell Phone Interface) control unit
Fuse ATO 30A 130 Electric parking brake controller unit
Fuse ATO 7.5A 131 Rear window antenna amplifier module
Fuse ATO 15A 133 Trailer recognition control unit Reversing camera (as of 1.9.10)
Fuse ATO 15A 134 Luggage compartment socket
Fuse ATO 7.5A 135 Park Assist; up 2008: Radar sensors control unit (SGR) Front short range radar sensor unit Rear short range radar sensor unit DISTRONIC PLUS up to 31.8.10 or Blind Spot Assist or Adaptive cruise control Plus Light: Radar sensors control unit (SGR) (from 2009) PARKTRONIC or Exclusive parking assist: PTS control unit
Fuse ATO 7.5A 136 Valid for model 221 with engine 642.8: AdBlue® control unit
Fuse ATO 7.5A 137 Reversing camera (as of 1.9.10)
Fuse ATO 5A 138 Navigation processor (from 2009) (up to 31.8.10) Emergency call system control unit (from 2009) Japanese version: TV/tuner connector (from 2009)
Fuse ATO 15A 139 Rear backrest refrigerator box
Fuse ATO 15A 140 Rear cigar lighter with ashtray illumination connector 115 V socket (from 2009)
Fuse ATO 5A 141 Reversing camera control unit
Fuse ATO 7.5A 142 Parktronic system (PTS) control unit Distronic Plus: Radar sensors control unit (SGR) Valid as of 1.9.10 for DISTRONIC PLUS and Active Blind Spot Assist or Active Lane Keeping Assist: Video and radar sensor system control unit
Fuse ATO 25A 143 Rear seats control unit
Fuse ATO 25A 144 Rear seats control unit
Fuse ATO 20A 145 Trailer recognition control unit (up to 2008) Trailer hitch socket (13-pin) (from 2009)
Fuse ATO 25A 146 Trailer recognition control unit
Fuse ATO 30A 147 up to 2008: TLC [HDS] control unit (Remote trunk closing)
Fuse ATO 7.5A 148 up to 2008: Universal Portable CTEL Interface (UPCI [UHI]) control unit
Fuse ATO 25A 148 from 2009: Panoramic sliding sunroof circuit 30 connector sleeve
Fuse ATO 5A 149 up to 2008: Voice control system (VCS [SBS]) control unit
Fuse ATO 25A 149 from 2009: Panoramic sliding sunroof control module
Fuse ATO 7.5A 150 TV combination tuner (analog/digital) Japanese version: TV/tuner connector (from 2009)
Fuse ATO 25A 151 W221; up to 2008: Electric parking brake controller unit
Fuse ATO 20A 151 W221; from 2009: Trailer recognition control unit
Fuse ATO 7.5A 152 W221: Rear window antenna amplifier module
Fuse ATO 25A 152 115 V socket: DC/AC converter control unit
Relay M Terminal 15 relay
Relay N Terminal 15R relay
Relay O Power outlet relay
Relay P Heated rear window relay
Relay Q Valid for engine 156, 157, 275, 278, 629: Circulation pump relay S 400 Hybrid: Valid for model 221.095/195: Power electronics circulation pump relay 2
Relay R Cigar lighter relay
Relay S Fuel pump relay Valid for engine 642.8 and engine 651 as of 1.6.11: Connected through the fuel pump: Refrigerant compressor magnetic clutch S 400 Hybrid: Power electronics circulation pump relay 1

Engine Compartment Fuse Box Diagram

The final fuse box is located in the engine compartment. Its specific location can vary based on the engine configuration but is generally found near the battery or the main engine control unit. This fuse box manages critical engine and powertrain related circuits, including engine management, ignition, and other essential operational components.

Type No. Description
Fuse ATO 10A 20 Valid for engine 629, 642, 651: CDI control unit, Valid for engines 156, 157, 272, 273, 275, 276, 278: ME-SFI [ME] control unit
Fuse ATO 20A 21 Valid for engines 156, 157, 272, 273, 275, 276, 278: Terminal 87 MI i connector sleeve, Valid for model 221 with engine 629 and engine 642: CDI control unit Fuel pump relay, Valid for model 221 with engine 651: Quantity control valve
Fuse ATO 15A 22 Valid for engines 156, 157, 272, 273, 276, 278: Terminal 87 connector sleeve
Fuse ATO 20A 23 up to 2008: Terminal 87 connector sleeve, Valid for engine 275 (model 216): Terminal 87 M1 i connector sleeve. Valid for engine 273 (model 216): Terminal 87 M2e connector sleeve. Valid for engine 272, 273 (model 221): Terminal 87M2i connector sleeve. Valid for engine 642: Terminal 87 connector sleeve. From 2009: Valid for engine 156, 157, 272, 273, 275, 276, 278: Terminal 87 connector sleeve. Valid for model 221 with engine 629 and engine 642: Terminal 87 connector sleeve. Valid for engine 156, 157, 272, 273, 276, 278: Terminal 87M2e connector sleeve. Valid for engine 275: Terminal 87 M2i connector sleeve. Valid for model 221 with engine 629 and engine 642: Terminal 87 connector sleeve. Valid for model 221 with engine 651: Rear SAM control unit with fuse and relay module.
Fuse ATO 25A 24 Valid for engines 157, 272, 273, 276, 278: Terminal 87Mle connector sleeve Valid for engine 642: CDI control unit
Fuse ATO 7.5A 25 Instrument cluster
Fuse ATO 10A 26 Left front lamp unit
Fuse ATO 10A 27 Right front lamp unit
Fuse ATO 7.5A 28 Valid for engine 275: EGS control unit Valid without engine 275: Fully integrated transmission control (VGS) control unit
Fuse ATO 5A 29 Rear SAM control unit with fuse and relay module
Fuse ATO 7.5A 30 Valid for engine 629, 642, 651: CDI control unit Valid for engines 156, 157, 272, 273, 275, 276, 278: ME-SFI [ME] control unit Fuel pump control unit
Fuse ATO 5A 31 S 400 Hybrid: Electric refrigerant compressor
Fuse ATO 15A 32 Valid for model with ECO start/stop function: Transmission oil auxiliary pump control unit S 400 Hybrid: Transmission oil auxiliary pump control unit
Fuse ATO 5A 33 Valid as of 1.9.10 without model is 400 Hybrid: ESP control unit S 400 Hybrid: Battery management system control unit DC/DC converter control unit Power electronics control unit
Fuse ATO 5A 34 400 Hybrid: Regenerative braking system control unit
Fuse ATO 5A 35 Electric parking brake controller unit
Fuse ATO 10A 36 Data link connector (Pin 16)
Fuse ATO 7.5A 37 For EIS control unit
Fuse ATO 7.5A 38 Central gateway control unit
Fuse ATO 7.5A 39 Instrument cluster
Fuse ATO 7.5A 40 Upper control panel control unit
Fuse ATO 30A 41 Slave wiper motor
Fuse ATO 30A 42 Master wiper motor
Fuse ATO 15A 43 Front cigar lighter with ashtray illumination
Fuse ATO 44
Fuse ATO 5A 45 S 400 Hybrid: Power electronics circulation pump 1
Fuse ATO 15A 46 W221 with Active Body Control (ABC), model 216: ABC control unit W221 without Active Body Contro (ABC): AIRmatic with ADS control unit
Fuse ATO 15A 47 Front SAM control unit with fuse and relay module Steering column up/down motor
Fuse ATO 15A 48 up to 2008: Front SAM control unit with fuse and relay module from 2009: Steering column in/out motor
Fuse ATO 10A 49 Steering column module
Fuse ATO 15A 50 AAC [KLA] control unit
Fuse ATO 7.5A 51 up to 2008: COMAND display
Fuse ATO 5A 51 from 2009: COMAND display SPLITVIEW display
Fuse FMM/MCase 15A 52A W221: Left fanfare horn Right fanfare horn
Fuse ATO 15A 52B W221, C216: Left fanfare horn Right fanfare horn
Fuse MAXI 53
Fuse MAXI 40A 54 AC air recirculation unit
Fuse MAXI 60A 55 Valid for gasoline engine: Electric air pump
Fuse MAXI 40A 56 W221 without Active Body Contro (ABC): AIRmatic compressor unit
Fuse MAXI 40A 57 up 2008: Wiper park position heater
Fuse MAXI 30A 57 from 2009: Wiper park position heater
Fuse MINI 5A 60 from 2009: Electrohydraulic power steering
Fuse MINI 7.5A 61 C216;W221-from 2009: Restraint systems control unit
Fuse MINI 10A 61 W221; up to 2008: Restraint systems control unit
Fuse MINI 5A 62 Night View Assist control unit
Fuse MINI 15A 63 Valid for model 221 with engine 629 and engine 642 as of 1.9.08: Fuel filter condensation sensor with heating element
Fuse MINI 7.5A 64 W221 as of 1.9.06: Driver NECK-PRO head restraint solenoid, Front passenger NECK-PRO head restraint solenoid
Fuse MINI 10A 64 W221 as of ’09: Driver NECK-PRO head restraint solenoid, Front passenger NECK-PRO head restraint solenoid
Fuse MINI 15A 65 Valid as of 1.6.09: 12 Volt connector in glove box
Fuse MINI 7.5A 66 DTR controller unit (Distronic or Distronic Plus)
Relay A Air pump relay
Relay B Air suspensión compressor relay
Relay C Terminal 87 relay, engine
Relay D Terminal 15 relay
Relay E Terminal 87 relay, chassis
Relay F Fanfare horn relay
Relay G Terminal 15R relay
Relay H Circuit 50 relay, starter View problems with the starter relay…
Relay J Circuit 15 relay, starter View problems with the starter relay…
Relay K Wiper park heater relay

By understanding the locations and diagrams of these four fuse boxes, you can effectively troubleshoot and maintain the electrical system of your 2007 Mercedes S550. Always refer to your vehicle’s owner’s manual for the most accurate and up-to-date information regarding fuse box locations and fuse assignments, as specifications can sometimes vary based on production date and optional equipment. Regularly checking your fuses is a simple yet crucial step in preventing more significant electrical problems and ensuring your Mercedes S550 remains in top operating condition.

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