How to Replace the Battery in an Older Mercedes Car Key?

[SanLucia]

To replace the battery in an older Mercedes car key, follow these steps: 1. From the tail end of the key, push up the marked switch to slightly eject the hidden mechanical key, which can then be removed; 2. Use the extracted mechanical key to press against the marked position, applying gentle force to open the key casing; 3. Once the casing is removed, take out the old battery and replace it with a new one. Taking the Mercedes A-Class as an example: this model measures 4622mm in length, 1796mm in width, and 1454mm in height, with a wheelbase of 2789mm. It is a 4-door, 5-seater sedan equipped with a 7-speed dual-clutch transmission.