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

[DiAsher]

Steps to replace the battery in a Mercedes-Benz E series key: 1. There is a small switch in the middle upper part of the key back, gently press it to remove the mechanical key; 2. Press the key back cover opening button on the back of the key to remove the back cover; 3. The battery is located in the battery compartment on the left side of the key; 4. Remove the old battery; 5. Insert the new battery, ensuring the "+" side faces up; 6. Reinstall the key cover and mechanical key; 7. Operate the key's lock and unlock switches to check and confirm that the doors can be locked/unlocked.