Home > DIY > M-Class > W163 (1997-2005) > 1998-2005 Benz ML320 ML350 ML500 Fuse Box Location Diagram
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1998-2005 Benz ML320 ML350 ML500 Fuse Box Location Diagram


Are you trying to find the fuse box location on your Mercedes-Benz M-Class W163. In this guide you will learn how to access the fuse box panel, see a copy of the fuse layout diagram and the fuse assignment.

Where is the fuse box panel located on a Mercedes-Benz on a ML320, ML350, ML430, ML500?

  • The main fuse box is located in the engine compartment, driver’s side.
  • Auxiliary fuse box is located inside the cabin, in the passenger foot well.

Fuse Guide Applications

Model:ML 320 ML 350 ML 430 ML 500 ML 55 AMG
Years:1998 1999 2000 2001 2002 2003 2004 2005
Mercedes Benz W163 Fuse box location

Main fuse box in engine bay

The main fuse box is located in the engine bay. It is on the left (driver’s) side of the engine. Pull the two tab toward the front and you will be able to lift up the fuse panel cover.

w163 fuse box 1998 1999 2000 2001 2002 2003 2004 2005
w163 fuse box 1998 1999 2000 2001 2002 2003 2004 2005
fuse chart ml320 ml350 ml55 ml500

Fuses in the engine bay ML Class 1998-2002 W163

Fuse #Pupose, Designation, FunctionAmpere
112 volt outlet socket15
2Left turn signal lamps7.5
3Right main headlight, head lamp7.5
4Sunroof, moon roof motor20/40
5Left bean headlamp,  head light7.5
6Lift gate wiper motor7.5
7wiper and washer system, front30
8Transfer case box25
9Instrument and license plate illumination7.5
10Anti dazzle mirror, vanity mirror, emergency call, RADIO, glove light10
11Fuel injection valves, engine functions15
12Parking lamp, left7.5
13Steering angle sensor, footwell plus ceiling lights, on board diagnossis10
14Engine control unit, diesel, fuel injection system25
15Brake stop lamps, brake light switch10
16Airbag control unit, SRS, A/C Air Conditioner system, gear selector module, instrument cluster15
1712 volt outlet in pssenger side, rear20
18Trailer socket, battery positive25
19Oxygen sensor, scavenging valve, fuel tank ventilation, vacuum pump, engine functions15
20mirror heater15
21sound system, radio, telephone, sound amplifier25
22Traction control, transmission, steering angle sensor, diagnossis, ML55 suction fan, rain sensor, on board computer, ETC, gear recognition, reverse and park lock, transfer case contol unit, ESP, fuel pump relay, engine electronics ME15
23Dynamic headlamp range adjustment15
24parking lamp, right7.5
25Turn signal lamp, right, trailer hitch, turn signal lamp7.5
26iginition coils15
27ABS hydraulic unit, traction contol40
28heated seats20
29Power Window Switch. front left / rear right30
30Power window Switch, front right / rear left30
31Switches, quarter window, mirror adjust, mirror lamps, rear vent window, outside mirror adjustment15
32Right Front, Seat adjustment switch, motor30
33Front Right, seat adjustment switch, motor30
34dipped beam headlamp left / head light assembley range adjustment, left low beam, left headlamp15
35Low beam right (passenger side), Right front head light unit.15
36Window heater, rear30
38Fuel pump,  Fuel level sensor20
39not used
40vacum pump for engine20
41Recirculation pmp, heater, Relay, coolant circulation pump, blower motor25
42Central locking door lock / unlock, keyfob remote20
43Heater fan, Blower motor30
44A/C, rear window washer pump, fan, air conditioner, engine fan stage 1, additional fan.30
45Air injection reactor pump, electrical air pump40
46Rear for lamp bulb7.5
47Fog lamps, front, High Beam light15
48Alarm signal, horn

Relays in engine compartment, ML320, ML350, ML500 ML55 AMG

K1Heated outside mirror relay
K3Fuel pump
K4Turn signal lamp, left
K5Instrument cluster, license plate lights
K6ESP Brake stop lamp suppression
K7Turn signal lamp, right
K8starter, solenoid switch KI 50 relay
K9Parking lamp, right
K10Not used
K11Termnial 15, voltage supply for diesel
K12circuit 15 relay
K13Parking lamp, left
K14comfort convenience relay
K15Central locking for doors, tail gate
K16Power windows right
K17Windshield wiper blades, interval
K18Power window, left
K19Heater, recirculation pump, e-box fan
K20Central door locking system, all doors, tailgate, fuel tank
K21Fan Heater
K22Dipped beam headlamp, contact piece, daytime driving light relay
K23Central door locking system, passenger door, rear doors
K24Central door locking, driver’s door, fuel tank filler cap
K25ABS Hydraulic Unit
K26Fan air conditioning system
K27rear window washer pump
K28Air injection reactor pump
K29Rear fog lamp
K30Fog headlamp / AUX
K31alarm horn

Auxiliary fuse box is located inside the cabin, in the passenger foot well.

A second fuse box is located in the passenger footwell. This is the auxiliary fuse box. To access the fuses inside you will need to twist the two plastic locks and pull the cover towards the back of the engine.

ML fuse box location interior dash
Interor cabin fuse box panel
W163 side dash fuses

Fuses in the auxiliary panel. 


1Instrument cluster, Airbag indicator7.5
2Cigartte outlet, lighter20
3Rear window wiper15
4E Call emergency call system, TeleAid7.5
5Instrument Cluster7.5
6Cockpit socket 12 volt outlet20
7not used
8Heated seats20
9not used
10Power seat adjustment, left30
11Power seat adjustment, right30
12not used
13electric fuel pump20
17Heated rear window25
19Headlamp cleaning system30
26Circuit 1570

Relays located in the fuse and relay box by the passenger foot-well.

RelayPupose, Function
K1Seat comfort relay
K2electric fuel pump
K4Heated rear window
K5Headlamp cleaning system
K9Circuit 15

What type of fuse do I need to replace blown fuse on my Mercedes-Benz?

fuse amere ratingWhen replacing blown fuses, make sure to use the same ampere rating fuse. The fuse rating is written on the fuse. You can verify that you are using the correct fuse, by making sure the fuse colors for the blown fuse and the new fuse match. This indicates the same ampere rating.

Your Mercedes-Benz uses Automotive Blade Fuse Type. A box of 100 fuses which include all the different ampere ratings that you need cost less than $20 on Amazon.


  1. hey there i have a 2003 ml350 W163, i have my BAS ABS and ETS lights on so i thought id check the relays and fuses but i don’t have a K25 Relay and there’s nothing listed there i do have the abs unit all i have is a F27 40 Amp fuse.

  2. Hello. Thank you for such an informative article. I have a ml350 w 163. The issue is that when you turn on the parking lamp, the bulb does not light up. So when you are driving at night, there is no light until you puch on the brake. I have checked all the fuses under the hood (F25/F1/F15/F24/F12) as well as the physical bulbs that are in the parking lamp socket, which are all working. I am convinced there was some sort of short specifically in that socket where the pocket lamp is. Would you have any suggestions please?

    • Yes it is very likely that you have a short. I would check for shorts and continuity at the rear tail lights. Also make sure there is no accidental contact between the tail light circuit and any metal parts. Get a multimeter and start testing back there. Compare both sides because it is most likely it is just one of the tail lights that is causing the problem.

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