You require a CR 2025 3 V cell battery.

- Take the mechanical key out of the SmartKey.

- Press mechanical key 2 into the opening in the SmartKey in the direction of the arrow until battery tray cover 1 opens.

When doing so, do not hold cover 1 shut.

- Remove battery tray cover 1.

- Repeatedly tap the SmartKey against your palm until battery 3 falls out.
- Insert the new battery with the positive terminal facing upwards. Use a lint-free cloth to do so.
- Make sure that the surface of the battery is free from lint, grease and all other forms of contamination.
- Insert the front tabs of battery tray cover 1 and then press to close it.
- Insert the mechanical key into the SmartKey.
- Check the function of all SmartKey buttons on the vehicle.