How to Replace the Battery in a Mercedes-Benz Viano 2.5 Key?

[MacKingston]

To replace the battery in the Mercedes-Benz Viano 2.5 key, follow these steps: 1. First, remove the mechanical key by sliding the switch at the top of the key, then pull the mechanical key upwards to extract it. 2. Use the extracted mechanical key to pry open the key cover by inserting it and gently lifting up and down. Once the back cover is removed, you can see the internal components. 3. Locate the battery inside the key, remove the old battery, and replace it with a new one. Finally, reattach the key cover to complete the battery replacement process.