Changing the battery
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.
See also:
Transmission positions
Park position
Do not shift the transmission into
position P unless the
vehicle is stationary. The parking
lock should not be used as a brake
when parking. In addition to
engaging the pa ...
Activating/deactivating PRE-SAFE®
Brake
PRE-SAFE® Brake is only available in vehicles
with DISTRONIC PLUS.
•► Press the button on the
steering wheel to select the DriveAssist
menu.
•► Press to select PRE-SAFE
Brake.
...
Control panel for dual-zone automatic climate control
Canada only
1. To activate/deactivate air-recirculation mode
2. To defrost the windshield
3. To switch the ZONE function on/off
4. Display
5. To set climate control to automatic
...
