Mercedes ML W163 fuse and relay

Mercedes ML W163 is the first generation of Mercedes-Benz M-class SUV 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 has been restyled. In this article you will find information about the location of electronic control units, a detailed description of the fuses and relays for the Mercedes ML 163 with box diagrams and photo examples of performance. Select the fuse responsible for the cigarette lighter.

Mercedes 163

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

Example diagram with cover




Location mercedes 163


1Air conditioning control unit – behind the audio unit (^08/01)
2Air conditioning/heater electronic control unit-in air conditioning/heater control panel (09/01^)
3Heater/air conditioner fan motor resistor – near fan motor
4Sunlight sensor (air conditioning system)
5Antenna unit – tailgate
6Anti-theft control unit (integrated with multifunctional control unit)
7Vehicle tilt sensor (anti-theft system) (integrated with trip computer)
8Anti-theft horn – engine compartment
9Volume change sensor (anti-theft system) (integrated with trip computer)
10Audio Output Amplifier (If Equipped) – Behind Left Side of Dashboard
11Accumulator battery
12Brake Booster Vacuum Pump – Left Side of Engine Compartment
13Brake booster vacuum pump control unit – left side of the engine compartment
14Compass control unit (navigation system) – under the trim panel, near the rear door latch
15Diagnostic connector (DLC)
16Fuse/Relay Box, Engine Compartment
17Fuse/Relay Box, Footwell
18Headlight control unit, left (models with xenon headlights)
19Headlight control unit, right (models with xenon headlights)
20Horns – behind the front bumper
21Immobilizer control unit – attached to multifunctional control unit 2(12/99^)
22Immobilizer ring antenna – in the ignition switch
23Turn signal/alarm relay – in multifunction control box 1
24Sunlight sensor – top center windshield
25Multifunction Control Module 1 – Attached to Engine Compartment Fuse/Relay Box – Functions: Interior lamps 1, exterior lamps, horns, windshield wipers, A/C pressure monitoring, central locking, power windows, direction indicators, anti-theft system , sunroof, seat heaters, immobilizer (^11/99)
26Multifunctional control unit 2-functions: Central locking, headlight washers, rear window defroster, seat heaters, air conditioning condenser fan motor, interior lamps
27Navigation control unit (integrated with audio system) – (if equipped)
28Ambient temperature sensor
29Parking system control unit – behind switch panel
30Rain sensor – upper center windshield
31Additional fuse 1 next to the battery
32Auxiliary fuse 2 (FL7,5/10A), engine control – in fuse box – Diesel
33Power seat control unit (with memory), front left – under the seat
34Power seat control unit (with memory), front right – under the seat
35Side impact sensor, left – B-pillar lower (09/01^)
36Side impact sensor, right – B-pillar lower (09/01^)
37SRS electronic control unit
38Phone interface control unit – under the front seat
39Transfer box control unit
40Transfer case select motor – on transfer case
41Electronic gearbox control unit
42Shift control unit – automatic transmission selector
43Trip computer

Passenger compartment

In the Mercedes ml 163 cabin, the fuse and relay box is located under the instrument panel, on the rack and is closed with a protective cover. To open it, you need to turn 2 fasteners 90 degrees. The box itself will look something like this.

photo of fuse box in Mercedes 163

Original diagram


Type 1


F17.5A Passenger airbag deactivation indicator
F220A Cigarette lighter front
F315A Rear window wiper motor
F440A A/C/heater fan motor, front
F57.5A Instrument cluster, air conditioning
F620A Accessory Power Connector
F1035A Driver’s seat adjustment switch block
F1135A Passenger seat adjustment switch block
F13Fuel pump / fuel level sensor
F1725A Heated rear window
F1930A Headlight washer pump
F207.5A Right headlight – high beam
F217.5A High beam – left headlight, high beam indicator
F2425A Electric rear windows
F2525A Power windows, front
1Electric seat
2Gasoline pump
4Rear window heating
5Headlight washer pump
6Headlights – high beam
8Main ignition circuits

Type 2


F17.5A Passenger airbag deactivation indicator
F220A Cigarette lighter fuse
F315A Rear window wiper motor
F57.5A Instrument cluster, air conditioning system
F620A Accessory Power Connector
F820A Heated front seats
F1030A Driver’s seat adjustment switch block
F1130A Passenger seat adjustment switch block
F1320A Gasoline pump / fuel level sensor
F1725A Heated rear window
F1930A Headlight washer pump
F2670A Relay main ignition circuits
1Power seats
2Gasoline pump
4Rear window heating
5Headlight washer pump
9Main 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 of the fuses are located in the fuse box under the hood.

Engine compartment

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.

Location under the hood

Photo example

photo of fuse box Mercedes ml 163

Check the information with your diagrams on the back of the protective cover of the unit.

original diagram




F115A Accessory connector, front
F27.5A Left direction indicators
F315A Right headlight – high beam
F420/30A Sunroof motor
F57,A High beam – left headlight, high beam indicator
F67.5A Rear wiper motor 20A Heated seats
F715/30A Windshield wiper/washer, hazard switch
F825A Transfer box control unit
F97.5A License plate lamps, switch illumination
F1010A Audio system, vanity mirror lights, trip computer, glove box light, cigarette lighter fuse, SRS indicator, interior rearview mirror
F1110/15A Engine management system (petrol)
F127.5A Front left/rear left lamps
F1310A Interior lamps, trip computer, seat belt indicator, steering wheel position sensor, diagnostic connector
F1410/25A Engine management system (Diesel)
F1510A Brake lights
F1615A Diagnostic connector, reversing light switch, A/C control unit, air intake changeover flap motor
F1715/20A Accessory power connector, luggage compartment
F1825A Trailer electrical connector
F1915A Engine management system (petrol)
F2015A Power door mirrors
F2115/25A Audio system, Telephone
F2215A automatic transmission, transfer case control unit, traction control, cruise control, steering wheel position sensor
F2315A Headlight range control unit
F247.5A Front Right/Rear Right Lamps
F257.5A Right direction indicators
F2615A Engine management system (petrol)
F2740A Traction Control System (TCS)
F2820A Seat heating
F2930A Multifunction switch – power windows
F3115A Power sunroof switch, power door mirrors, power rear windows
F3230A Right front seat power
F3330A Power front left seat
F347,5A Left headlight – dipped beam, headlight range control
F357.5A Right headlight – low beam
F3610/25A Heated rear window 20A Horn
F3720A Horn
F3820A Fuel module (fuel pump) / fuel level sensor
F4025A Brake booster vacuum pump (ML270CDI) or Audio system
F41Coolant Pump Motor, Cooling Fan Motor Fuse Box/Relay Auxiliary Heater
F4220A Central locking
F4320/30A Heater Fan Motor Relay, Heater/A/C Fan Motor Relay (Rear)
F4430A A/C condenser fan motors 15A Rear window washer pump, A/C condenser fan motor relay (except ML320/ML350)
F4540A EGR vacuum pump motor
F467,5/15A Rear PTF
F4715A Front fog lights
F4820A Anti-theft signal
1Rear window heating
2Cooling fan
3Fuel pump relay (except ML270CDI)
4Left turn signal
5License plate lights, instrument cluster
6Disabling brake lights (ESP)
7Right direction indicators
9Right front / rear dimensions
11Main Ignition Circuits (ML270CDI)
12Main ignition circuits
13left front / rear dimensions
14Power windows
15Central locking – unlocking the rear door
16Passenger power window drive
17Intermittent windshield wiper
18Driver’s power window drive
19Coolant pump
20Central locking – door lock
21Heater Fan, Fuse/Relay Box Cooling Fan Either Central Locking
22dipped headlights
23Central Locking Relay – Unlock Passenger’s Door and Rear Side Doors
24Central locking relay – driver’s door unlock
25ABS pump
26Air conditioning condenser fan
27Rear window washer pump
28Exhaust air supply pump
29Rear fog lights
30Front fog lights
31Horn (with anti-theft system)


If you know how to make the material better – write in the comments.

Comments 1

  • Thank you for the information posted here it is very helpful. I have a 2001 ML320, I am looking for the exact location of the Transmission Control Relay. I have looked in many links hoping to locate the location with no success. Can anyone help me and Thank you.

Leave a Reply

Your email address will not be published. Required fields are marked *