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How to Change the Key Battery on a Mercedes A-Class

Model: Mercedes Classe A W176 - Years: 2012, 2013, 2014, 2015, 2016, 2017, 2018
Part: Key

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Video tutorial

Is the key battery on your Mercedes A-Class dead? Here’s how to change it. Take your remote key, and using a screwdriver, pry apart the rear plastic cover of the key (lever between the key cover and the plastic shell). Remove the old battery, and get a new one of the same size and voltage.

Reassemble the cover on your remote by pressing it until you hear it click into place. Test the remote key by pressing the lock and unlock buttons for the car doors.


Updated on 18 March 2026 by ScegliAuto


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by ScegliAuto

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