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How to Replace the Battery in a Mercedes Key?

1 Answers
LeBrantley
07/24/25 11:56pm

Method for replacing the battery in a Mercedes key: 1. Check the battery model for the car key, which is usually specified in the vehicle's user manual, then select a new key battery according to the specified model; 2. Push the marked switch upward from the tail of the key, and the hidden mechanical key will pop out slightly, allowing you to remove the mechanical key; 3. Use the removed mechanical key to press against the marked position and apply gentle force to open the key casing; 4. After opening the key casing, you will find the battery located deep inside. Insert any tool into the side gaps and gently pry to remove the old battery; 5. Install the new battery, ensuring the positive and negative terminals are correctly aligned, and finally reinsert the mechanical key.

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