Mercedes-Benz E-Class Quiz
Roadside assistance

Electrical fuses

In this manual: Roadside assistance
Introduction — 5At a glance — 6Safety — 25Opening and Closing — 17Seats, steering wheel and mirrors — 12Lights and windshield wipers — 11Climate Control — 11Driving and parking — 44On-board computer and displays — 29Stowing and Useful Information. Good to Know — 1Stowing and Useful Information. Storage Options — 10Stowage and convenience features. Convenience features — 7Maintenance and care — 11Roadside assistance — 13Wheels and tires — 13Technical data — 13
~4min read

The electrical fuses in the Mercedes E-Class (4th gen, W212, 2009–2016) protect important vehicle functions from damage caused by electrical circuits. This section provides detailed safety and handling information for correctly replacing fuses and explains the locations of the fuse boxes in the vehicle.

Important Safety Notes

WARNING

If you tamper with a defective fuse, bridge it, or replace it with a fuse of higher amperage, the electrical wiring may become overloaded. This can cause a fire. There is a risk of accident and injury!

Always replace defective fuses with specified new fuses with the correct amperage.

NOTE

Use only fuses approved by Mercedes-Benz with the specified fuse rating for the relevant system. Otherwise, parts or systems may be damaged.

The electrical fuses in your vehicle are designed to switch off defective circuits. A blown fuse causes the downstream components and the functions connected to them to fail.

Blown fuses must be replaced with equivalent fuses, identifiable by their color and fuse rating. Refer to the fuse assignment chart for the fuse ratings.

If a newly installed fuse blows again, have the cause determined and corrected by a qualified specialist workshop.

Before replacing a fuse

Observe the important safety information.

Secure the vehicle against rolling away.

Switch off the engine.

Switch off all electrical consumers.

Remove the key from the ignition lock.

or, on vehicles with KEYLESS-GO

Open the driver's door.
  • The vehicle electronics are now in position 0, meaning "key removed". The driver's door can be closed again. All warning lamps in the instrument cluster must be off.

    The electrical fuses are distributed across several fuse boxes:

    • Engine compartment fuse box, driver's side (left-hand side in direction of travel)
    • Luggage compartment fuse box, passenger's side (right-hand side in direction of travel)
    The fuse layout plan is in the onboard tool kit, in the storage compartment under the luggage compartment/cargo area floor.

    Engine compartment fuse box

    Observe the important safety information.

    WARNING

    If the wipers start moving while the hood is open, you can get caught in the wiper linkage. Risk of injury!

    Always switch off the wipers and the ignition before opening the hood.

    NOTE

    Make sure no moisture can enter the fuse box while the cover is open.

    When closing the cover, make sure it sits properly on the fuse box. Otherwise, moisture or dirt entering may impair the function of the fuses.

    Sicherungskasten im Motorraum

    Make sure the wipers are switched off.

    Open the hood.

    Use a dry cloth to remove any moisture from the fuse box.

    To open: Remove the wiring harnessesfrom the guides.

    The wiring harnessesto the side. To do so, route the wiring harnesses behind the connectorpast.

    Open the retaining clips.

    Remove the fuse box cover towards the front.

    To close: Check that the seal sits properly in the cover.

    Insert the rear of the fuse box cover into the holder.

    Fold the cover down and fasten the retaining clipsagain.

    The wiring harnessesin the guides.

    Close the hood.

    Luggage compartment fuse box

    Observe the important safety information.

    NOTE

    Make sure no moisture can enter the fuse box while the cover is open.

    When closing the cover, make sure it sits properly on the fuse box. Otherwise, moisture or dirt entering may impair the function of the fuses.

    Sicherungskasten im Kofferraum

    Open the trunk lid.

    Open: The coverrelease with a flat object at the top left and right.

    The coverSwivel down in the direction of the arrow.

    Cargo area fuse box

    Observe the important safety information.

    NOTE

    Make sure no moisture can enter the fuse box while the cover is open.

    When closing the cover, make sure it sits properly on the fuse box. Otherwise, moisture or dirt entering may impair the function of the fuses.

    Sicherungskasten im Laderaum

    Open the tailgate.

    Open: By the handlePull out of the cover.

    Swivel the cover downwards.

    The trim panelforward.

    The electrical fuses of the Mercedes E-Class W212 (model years 2009–2016) reliably protect the vehicle electrical system against overload. Mercedes provides clear instructions for replacing fuses to avoid fire risk or damage to the vehicle electrical system.

    It is especially important to use original, approved fuses with the correct amperage. This keeps the systems functioning and ensures operational safety.

    Question: Why must fuses not be replaced with higher-rated ones?

    Answer: Because cables may otherwise be overloaded and fires may start.

    Question: Where is the fuse layout plan located?

    Answer: In the onboard tool kit, in the storage compartment under the luggage compartment floor.

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