Mercedes ML W163 is the first generation of M-class SUVs Mercedes-Benz which was produced in 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005 in various modifications (ML 230, ML 320, ML 350, ML 430, ML 500, ML 55 AMG, ML 270 CDI, ML 400 CDI). During this time, the model was restyled. In this article you will find information about the location of electronic control units, a detailed description of fuses and relays Mercedes ML 163 body with block diagrams and photo examples of execution. We will highlight the fuse responsible for the cigarette lighter.
The location of the blocks and the purpose of the elements in them may differ from that shown and depends on the year of manufacture and the level of electrical equipment.
Example diagram from the cover
Location
Block layout diagram
Description
| 1 | Air conditioning control unit – behind the audio system unit (^08/01) |
| 2 | Electronic control unit for air conditioning/heating – in the control panel for air conditioning/heating (09/01^) |
| 3 | Heater/Air Conditioner Blower Motor Resistor – Near Blower Motor |
| 4 | Sunlight sensor (air conditioning system) |
| 5 | Antenna Block – Rear Door |
| 6 | Anti-theft system control unit (integrated with multifunctional control unit) |
| 7 | Vehicle tilt sensor (anti-theft system) (integrated with trip computer) |
| 8 | Anti-theft alarm sound – engine compartment |
| 9 | Volume change sensor (anti-theft system) (integrated with trip computer) |
| 10 | Audio output amplifier (if equipped) – behind the left side of the instrument panel |
| 11 | Battery |
| 12 | Brake booster vacuum pump – left side of engine compartment |
| 13 | Brake Booster Vacuum Pump Control Unit – Left Engine Compartment |
| 14 | Compass control unit (navigation system) – under the trim panel, near the rear door latch |
| 15 | Diagnostic Link Connector (DLC) |
| 16 | Fuse/Relay Box, Engine Compartment |
| 17 | Fuse/Relay Box, Footwell |
| 18 | Headlight control unit, left (models with xenon headlights) |
| 19 | Headlight control unit, right (models with xenon headlights) |
| 20 | Sound signals – behind the front bumper |
| 21 | Immobilizer control unit – attached to the multifunctional control unit 2(12/99^) |
| 22 | Ring antenna of the immobilizer – in the ignition switch |
| 23 | Direction indicator/hazard warning relay – in multifunction control unit 1 |
| 24 | Sunlight sensor – upper center of windshield |
| 25 | Multifunction control unit 1 – attached to the fuse/relay box in the engine compartment – functions: Interior lights 1, exterior lights, horns, windscreen wipers, air conditioning pressure monitoring, central locking, electric windows, direction indicators, anti-theft alarm, sunroof, seat heaters, immobilizer (^11/99) |
| 26 | Multifunctional control unit 2-functions: Central locking, headlight washers, rear window heater, seat heaters, air conditioner condenser fan motor, interior lights |
| 27 | Navigation system control unit (integrated with audio system) – (if available) |
| 28 | Ambient air temperature sensor |
| 29 | Parking system control unit – behind the switch panel |
| 30 | Rain sensor – upper center of windshield |
| 31 | Additional fuse 1 near the battery |
| 32 | Additional fuse 2 (FL7.5/10A), engine management – in fuse box – Diesel |
| 33 | Electric seat control unit (with memory), front left – under the seat |
| 34 | Electric seat control unit (with memory), front right – under the seat |
| 35 | Side impact sensor, left – lower part of the B-pillar (09/01^) |
| 36 | Side Impact Sensor, Right – Lower B-Pillar (09/01^) |
| 37 | SRS Electronic Control Unit |
| 38 | Telephone interface control unit – under the front seat |
| 39 | Transfer case control unit |
| 40 | Transfer case mode selection motor – on the transfer case |
| 41 | Electronic control unit of the gearbox |
| 42 | Gear shift control unit – automatic transmission selector |
| 43 | Trip computer |
Block in the cabin
In the Mercedes ML 163 cabin, the fuse and relay box is located under the instrument panel, on the pillar and is covered with a protective cover. To open it, you need to turn 2 fasteners 90 degrees. The block itself will look something like this.
Option 1
Designation
| F1 | 7.5A Passenger Airbag Off Indicator |
| F2 | 20A Front Cigarette Lighter |
| F3 | 15A Rear Window Wiper Motor |
| F4 | 40A Air Conditioner/Heater Blower Motor, Front |
| F5 | 7.5A Instrument cluster, air conditioning system |
| F6 | 20A Additional Equipment Power Socket |
| F7-9 | — |
| F10 | 35A Driver’s Seat Adjustment Switch Block |
| F11 | 35A Passenger Seat Adjustment Switch Block |
| F13 | Fuel pump/fuel level sensor |
| F16 | — |
| F17 | 25A Rear window heating |
| F18 | — |
| F19 | 30A Headlamp Washer Pump |
| F20 | 7.5A Right headlight – high beam |
| F21 | 7.5A High beam – left headlight, high beam indicator |
| F22 | — |
| F23 | — |
| F24 | 25A Rear electric windows |
| F25 | 25A Electric window lifts, front |
| Relay | |
| 1 | electric seats |
| 2 | Gasoline pump |
| 3 | — |
| 4 | Rear window heating |
| 5 | Headlight washer pump |
| 6 | Headlights – high beam |
| 7 | — |
| 8 | Main ignition circuits |
| 9 | |
Option 2
Purpose
| F1 | 7.5A Passenger Airbag Off Indicator |
| F2 | 20A Cigarette Lighter Fuse |
| F3 | 15A Rear Window Wiper Motor |
| F4 | – |
| F5 | 7.5A Instrument cluster, air conditioning system |
| F6 | 20A Additional Equipment Power Socket |
| F7 | – |
| F8 | 20A Heated front seats |
| F9 | – |
| F10 | 30A Driver’s Seat Adjustment Switch Block |
| F11 | 30A Passenger Seat Adjustment Switch Block |
| F13 | 20A Fuel pump/fuel level sensor |
| F16 | – |
| F17 | 25A Rear window heating |
| F18 | – |
| F19 | 30A Headlight Washer Pump |
| F20-25 | |
| F26 | 70A Main Ignition Circuit Relay |
| Relay | |
| 1 | Electric seats |
| 2 | Gasoline pump |
| 3 | |
| 4 | Rear window heating |
| 5 | Headlight washer pump |
| 6 | |
| 9 | Main ignition circuits |
In both versions of the Mercedes ML W163, fuse number 2 is responsible for the operation of the front cigarette lighter. The rest are controlled by fuses in the block under the hood.
Block under the hood
Under the hood, the main fuse and relay box is located on the left side behind the protective cover. To access it, you need to press the latches.
Check the information against your diagrams on the back of the protective cover of the unit.
Transcript
| F1 | 15A Front auxiliary equipment connector |
| F2 | 7.5A Left direction indicators |
| F3 | 15A Right headlight – high beam |
| F4 | 20/30A Hatch Drive Motor |
| F5 | 7,A High beam – left headlight, high beam indicator |
| F6 | 7.5A Rear Window Wiper Motor 20A Heated Seats |
| F7 | 15/30A Windscreen Wiper/Washer, Hazard Warning Switch |
| F8 | 25A Transfer Case Control Unit |
| F9 | 7.5A License Plate Lights, Switch Lights |
| F10 | 10A Audio system, vanity mirror lights, trip computer, glove box light, cigarette lighter fuse , SRS indicator, interior rearview mirror |
| F11 | 10/15A Engine Management System (Petrol) |
| F12 | 7.5A Front left side light/rear left side light bulbs |
| F13 | 10A Interior lights, trip computer, seat belt reminder, steering wheel position sensor, diagnostic socket |
| F14 | 10/25A Engine Management System (Diesel) |
| F15 | 10A Brake lights |
| F16 | 15A Diagnostic socket, Reversing light switch, Air conditioning control unit, Air intake flap motor |
| F17 | 15/20A Additional equipment power socket, luggage compartment |
| F18 | 25A Trailer Electrical Socket |
| F19 | 15A Engine Management System (Petrol) |
| F20 | 15A Electric rear view mirrors |
| F21 | 15/25A Audio system, Telephone |
| F22 | 15A Automatic transmission, transfer case control unit, traction control system, cruise control system, steering wheel position sensor |
| F23 | 15A Headlight Correction Control Unit |
| F24 | 7.5A Front right side light/rear right side light |
| F25 | 7.5A Right direction indicators |
| F26 | 15A Engine Management System (Petrol) |
| F27 | 40A Traction Control System (TCS) |
| F28 | 20A Seat heating |
| F29 | 30A Multifunction Switch – Electric Window Lifter |
| F30 | |
| F31 | 15A Electric sunroof switch, electric door mirrors, electric rear windows |
| F32 | 30A Right Front Seat Electric Drive |
| F33 | 30A Front Left Seat Electric |
| F34 | 7.5A Left headlight – low beam, headlight corrector |
| F35 | 7.5A Right headlight – low beam |
| F36 | 10/25A Rear window heating 20A Horn |
| F37 | 20A Horn |
| F38 | 20A Fuel module (fuel pump) / fuel level sensor |
| F39 | — |
| F40 | 25A Brake Booster Vacuum Pump (ML270CDI) or Audio System |
| F41 | Coolant pump motor, cooling fan motor, fuse box/relay, auxiliary heater |
| F42 | 20A Central locking |
| F43 | 20/30A Heater Blower Motor Relay, Heater/A/C Blower Motor Relay (Rear) |
| F44 | 30A A/C Condenser Blower Motors 15A Rear Window Washer Pump, A/C Condenser Blower Motor Relay (except ML320/ML350) |
| F45 | 40A EGR Vacuum Pump Motor |
| F46 | 7.5/15A Rear Fog Lights |
| F47 | 15A Front fog lights |
| F48 | 20A Anti-theft alarm |
| Relay | |
| 1 | Rear window heating |
| 2 | Cooling system fan |
| 3 | Fuel Pump Relay (except ML270CDI) |
| 4 | Left turn signal |
| 5 | License plate lights, instrument cluster |
| 6 | Disabling brake lights (ESP) |
| 7 | Right direction indicators |
| 8 | Starter |
| 9 | Right front/rear side lights |
| 10 | — |
| 11 | Main Ignition Circuits (ML270CDI) |
| 12 | Main ignition circuits |
| 13 | Left front/rear side lights |
| 14 | Electric window lifters |
| 15 | Central locking – rear door unlocking |
| 16 | Passenger window lift drive |
| 17 | Intermittent windshield wiper operation |
| 18 | Driver’s window lift drive |
| 19 | Coolant pump |
| 20 | Central locking – door locking |
| 21 | Heater Fan, Fuse/Relay Box Cooling Fan Or Central Locking |
| 22 | Low beam headlights |
| 23 | Central locking relay – unlocking the passenger door and rear side doors |
| 24 | Central lock relay – driver’s door unlock |
| 25 | ABS pump |
| 26 | Air conditioner condenser fan |
| 27 | Rear window washer pump |
| 28 | Exhaust air supply system pump |
| 29 | Rear fog lights |
| 30 | Front fog lights |
| 31 | Horn (with anti-theft system) |