How to Replace the Battery in a Mercedes Remote Key?

[DelLukas]

Mercedes remote key battery replacement steps are as follows: 1. From the tail of the key, push up the marked switch, and the hidden mechanical key will pop out slightly. 2. Then you can take out the mechanical key. 3. Use the just removed mechanical key to press against the marked position, apply a little force, and the key shell can be opened. 4. After replacing with a new battery, ensure the battery's positive and negative poles are not reversed, then proceed with installation—insert the top of the shell first, then press the other end firmly. In daily use, dropping the car key from a height can easily damage it. Another scenario is water ingress into the key; if water seeps inside and damages the circuit, it can also cause the remote to malfunction.