2006-2015 Mercedes Key Fob Battery Replacement

If your Mercedes key isn't responding when you...

iFixit Library Mercedes-Benz Very easy 1 - 4 minutes Guide 155981

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Guide overview

Before you begin

If your Mercedes key isn't responding when you press any of its buttons, use this guide to replace the battery. This guide will display instructions on replacing the battery in the 2006-2015 Mercedes key fob for Cl-Class, R-Class, C-Class, E-Class, S-Class, GL-Class, ML-Class, and G-class. This easy-to-use step-by-step guide can help you quickly repair your key fob to continue usage. The only item required to restore the key is a replacement battery. The process is brief, taking only minutes to complete.

Step 1

Repair step

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The release switch is at the bottom of the key under the unlock button and the trunk button.
Slide the release switch to the side.
While sliding the release switch, pull the key out.

Step 2

Repair step

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TOOL USED ON THIS STEP Spudger Referenced by the iFixit guide

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Insert the key in the inside slit to release the back cover.
Remove the back cover.

Step 3

Repair step

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TOOL USED ON THIS STEP Spudger Referenced by the iFixit guide

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Insert the pointed end of a spudger in the gap between the battery and the key.
Push up after inserting the screwdriver to pry the battery out.

Step 4

Repair step

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Slide the new battery in at the edge first. (It should fall into place.)

Step 5

Repair step

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TOOL USED ON THIS STEP Spudger Referenced by the iFixit guide

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Put the back cover back in place.
Put the key in its original spot.