See also:

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. ...

Activating/deactivating Bluetooth
Bluetooth is not permitted everywhere. Comply with all safety guidelines and regulations. 1. "Telephone" 2. "Options" Open. 3. "Bluetooth®" ...

Setting the language
Press the adjustment button for 12‑13 seconds. Briefly press the adjustment button again to switch between English "E" and German "O". The setting is automatically saved ...