Home > DIY > M-Class > W166 M-Class (2012-Present) > Fuse Relays M-Class W166 2012-Present Mercedes-Benz ML 250 350 400 550 63 GLE AMG
w166 ml class benz gle fuses location chart

Fuse Relays M-Class W166 2012-Present Mercedes-Benz ML 250 350 400 550 63 GLE AMG

Trying to find the fuse box location on your Mercedes-Benz? Whether looking for the cigarette, lighter, radio, COMAND, or Navigation fuse location, you will find all of them here.

Location of the fuse box panels on Mercedes-Benz?

  • Engine Bay Fuse Box (Passenger Side)
  • Engine Bay prefuse Box ( Engine bay, by the hood hinge, pass. side)
  • Fuse box in the interior of the vehicle. Side of the dash on the pass. side.
  • Prefuse box under the passenger seat.
  • Rear fuse box by the rear seat.
  • Fuse box for battery protection. By rear battery in the trunk, passenger side.

Fuse Types Used on Mercedes-Benz

The ATO and MAXI fuses are installed on the fuse box panels. All these fuses can be purchased on Amazon; links are provided below. They are inexpensive when purchased online.

Fuse Guide Applications

Model: ML350 ML400 ML550 ML63 AMG ML250 Diesel
Years: 2012 2013 2014 2015 2016
Chassis: W166, GLE
Make: Mercedes-Benz

Interior Fuse Box -Dashboard, Passenger Side

w166 fuse box interior location

The interior fuse box is located on the side of the dash. You will find the fuse box if you look at the passenger side of the dash. A plastic cover can easily be removed. Use a Dash Trim Removal Tool to avoid damaging the dashboard.

Fuses located in the dashboard.

Fuse Location, Purpose, Designation Ampere
10 Ignition Lock 7.5
11 Steering column 10
12 Instrument cluster 5
13 Blower fan air conditioner 15
14 Connector 5
15 Upper control panel 5
16-18 not used
19 Air Conditioner 15
20 Steering column 5
21 Audio / Radio / COMAND /Stereo 5
22 not used

Fuse and relay box under the rear seat

SL55 SL500 R230 Fuse Chart Location

To access this fuse box, you must fold the rear passenger seat forward. Under the seat, you will see a box with relays and fuses inside. To access the fuses, press the tabs on the front of the box and lift the panel cover. List of fuses under the rear seat. Here you will find fuses F100 to F157.

Fuse Function, Purpose, Designation Ampere
100 Radio, COMAND, Navigation, Stereo DVD, Nav 5
101 Trailer Hitch 20
102 Driver Seat Controls 7.5
103 Passenger Seat Control 7.5
104 Telephone/Antenna Amplifier 5
105 Navigation 5
106 Liftgate 5
107-109 Not used
110 AdBlue for diesel engines 5
111 Trailer Hitch Connection 15
112 Fuel Electronics 5
113 Parking brake 5
114 Exterior lights 5
115 Trailer hitch 5
116 Districts Plus, Blind Spot Assist, Active Lane Keeping SENSORS 5
117 Night View Assist 5
118 Not used
119 Transfer Case 5
120 Fuel Sensor 5
121-123 Not Used
124 Brake Control Connector 30
125 Not used
126 Trailer Hitch 15
127 Driver seat Controls 30
128 Trailer Recognition 20
129 Passenger Seat Controls 30
130 Trailer Recognition 20
131 Not Used
132 Fuel System 25
133 Stationary Heater 5
134 Seat occupancy Sensor, child sensor, front passenger 5
135 The light bulb glove compartment 5
136 SRS, Airbag 7.5
137 Camera, Toll Conection 15
138 Anti-roll system, car stabilization 15
139 Not used
140 AdBlue System for Diesel Vehicles 7.5
141 AdBlue System for Diesel Vehicles 15
142 AdBlue System for Diesel Vehicles 20
143 Not used
144 Not used
145 Cup Holder / Temperature 7.5
146 Rear window heater 30
147 Radio / Comand / Audio / Navigation 30
148 Cigarette Lighter / Output 15
149 Not used
150 Outlet 12-volt back/trunk/cargo area 20
151 Outlet back seat, socket 12 volt 20
152 Control Unit N10/8 30
153 115 Volt Outlet fuse – AC Converter 25
154 Rear liftgate 40
F157 Circuit 15R1 15

Relays under the rear seat

Relay Purpose
A Power Outlet
B Rear window heater relay
C Backup
E Circuit 15
F Rear window wiper
G Circuit 15R1
H Not used
I Backup

Engine Compartment Fuse Box

Fuse Box Chart in Engine Bay W164 m-class

A fuse and relay box are located in the engine bay on the passenger side. To access this panel, open the hood and look on the left side of the engine. You will see the fuse box right behind the headlight. Remove the fuse cover by pressing on the locking tabs. Here you will find fuses F201 to F241.

Fuse Purpose, Function, Designation Ampere
201 Not used
202 Stationary Heater 20
203 Alarm, Antitheft System 5
204 ESP 25
205 Horn 15
206-212 Not used
213 Engine Electronics 7.5
214 Engine Electronics 15
215 Radiator Actuator, Connector 15
216 Engine Compartment Electrical, Engine Mount 15
217 Electrical Connector 20
218 Not Used
219 PAir cooler pump 10
220-228 Not used
229 Left headlight 7.5
230 ESP Electronic Stability Program 5
231 Right headlamp 7.5
232 Tranmission control unit 15
233 Bi-xenon headlight lamp, intelligent light 15
234 DISTRONIC, Active Blind 5
235 Wipers 20
236 Not used
237 Intelligent module, Direct Select 30
238 AIRMatic Air Suspension, Adaptive Damping System 40
239 Windshield wiper motor 30
240 Starter Motor 30

Resources and useful links

Here is a list of useful resources related to the fuses and relays on the Mercedes-Benz M-Class W166 and GLE. These are external links.

What fuse type do I need to replace a blown fuse?

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

  • fuse amere ratingWhen replacing blown fuses, 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 ensuring the fuse colors match the blown fuse and the new fuse. This indicates the same ampere rating.
  • Make sure to close the fuse box cover properly and lock the tabs. This is very important to avoid any moisture getting inside the fuse box. The fuse box panel has a seal to keep water and moisture out of the box.

What is the importance of knowing where the fuse box is?

  1. Electrical troubleshooting: When a vehicle has an electrical problem, such as a malfunctioning radio or a non-functioning turn signal, the fuse box is the first place to check. By knowing the location of the fuse box, the driver or technician can quickly check the fuses related to the malfunctioning electrical component.
  2. Preventing damage: Fuses protect the electrical components of a vehicle from damage caused by power surges or overloads. By knowing the location of the fuse box, the driver can quickly replace a blown fuse and prevent further damage to the vehicle’s electrical system.
  3. Safety: In some cases, a blown fuse can cause a safety hazard. For example, if the fuse for the brake lights is blown, other drivers may not be able to see when the vehicle is stopping. Knowing the location of the fuse box and the function of each fuse can help prevent accidents and ensure the safety of the vehicle’s occupants and other drivers on the road.
  4. Maintenance: To maintain a vehicle’s electrical system, it is important to check the fuses and replace any that are blown regularly. Knowing the location of the fuse box and how to access it can make this process quicker and easier.

Overall, knowing the location and function of the fuse box is important for maintaining a vehicle’s electrical system and ensuring the safety of its occupants and others on the road.

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