Check the power distribution panels first when any electrical component stops working; most faults trace back to a blown link or relay in one of three locations: engine compartment, passenger cabin, or rear cargo area.
The main panel under the hood controls high-load systems such as cooling fans, ABS module, and ignition circuits, while the interior unit manages lighting, infotainment, and control modules. A third unit near the trunk handles rear electronics including tail lights and power liftgate. Access points differ, so knowing each placement saves time during inspection.
Use the cover label or service manual to match slot numbers with circuits; each position is rated in amps, commonly 5A to 40A. Replacing a burnt element with incorrect rating can damage wiring or control units. Always compare the color code and number before installation.
For quick diagnostics, carry a test light or multimeter and check voltage on both sides of each insert without removing it. This method confirms continuity and identifies faults faster than visual inspection alone.
2020 Mercedes GLE 350 Fuse Box Diagram Locations and Circuit Details
Locate all three power distribution units before troubleshooting; one sits in the engine compartment near the battery, another behind a side panel on the dashboard, and a third in the rear cargo area under the floor cover.
The under-hood unit handles high-current circuits. Typical assignments include:
- Cooling fan control module 40A
- ABS pump 30A
- Engine control unit supply 15A
- Starter relay feed 25A
The cabin panel supports interior electronics and control systems. Common slot roles:
- Infotainment system 10A
- Climate control module 15A
- Instrument cluster 7.5A
- Interior lighting circuits 5A
Rear compartment distribution unit manages systems at the back of the vehicle. This includes tail lamps, power liftgate, and rear outlets, typically rated between 10A and 30A depending on load.
Check each slot using a multimeter by probing both contact points; voltage on one side only indicates a blown insert. Replace with identical amperage and confirm circuit operation before reassembling covers.
Exact locations of fuse boxes in engine bay trunk and cabin
Open the hood and inspect the right side near the battery housing; the main power distribution unit is secured under a plastic cover with locking tabs that must be pressed inward before lifting.
Move to the driver side interior and remove the side panel at the end of the dashboard, accessible when the door is open; behind this trim sits the cabin electrical panel aligned vertically with clearly numbered slots.
Check the rear cargo area by lifting the floor panel; a secondary unit is positioned near the spare wheel compartment, protected by a snap-on cover that can be removed without tools.
Each location serves a separate group of systems, so verify the correct area before testing any circuit; mixing up compartments leads to unnecessary disassembly and wasted time.
Ensure all covers are reinstalled tightly after inspection to prevent moisture or dust from entering the electrical distribution units.