How to Replace the Battery in a Mercedes Key Fob?

[DelElijah]

Replacing the battery in a Mercedes key fob involves the following steps: 1. From the end of the key, push up the marked switch to release the hidden mechanical key, then remove it. 2. Using the extracted mechanical key, press against the marked position at the key's end with slight force to open the key casing. 3. Once the casing is open, the battery is located deep inside; gently pry it out using any tool inserted into the side gaps. 4. When installing the new battery, ensure the positive and negative poles are correctly aligned. 5. To reassemble, first insert the top of the casing, then press firmly on the other end to complete the battery replacement.