See also:

Contacts
...

When the vehicle is parked
If you still want to view the time, external temperature and odometer reading briefly after the remote control has been taken out of the ignition lock: Press button 1 in the instrument cluster. ...

Vehicle battery
Maintenance The battery is maintenance-free, i.e., the electrolyte will last for the life of the battery. Your service center will be glad to advise you on questions regarding the battery. Batt ...