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How To Replace the Battery in Your Car's Keyless Remote


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Removing the Battery on Painful Car Remotes, like Mercedes-Benz
Replacing a Mercedes keychain battery.

Slide the lever sideways and pop out the emergency key.

photo by Matt Wright, 2009
If you've read this far you obviously don't have the one-step replacement cover on your car remote. You're at a crossroads. The left fork leads to a life of unlocking your car door with a metal key, the right leads to a difficult but completely do-able battery replacement followed by a year of hands-free bliss.

This procedure covers Mercedes remotes, but the steps are similar for many higher end units.

Here we go:

Step 1: Remove the metal back-up key from the remote unit by sliding its locking mechanism to the side then pulling the key out.

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