See also:

Locking and unlocking
Pressing the buttons locks and unlocks the doors and the tailgate when the front doors are closed, but they are not secured against theft. The fuel filler flap remains unlocked. ...

Activating HDC
Press the button; the LED above the button lights up. ...

Example: dialing a phone number
1. Briefly press the button on the steering wheel. 2. ›Dial number‹ The system says: »Please say the number« 3. E.g., ›123 456 790‹ The system says: »123 456 790. Continue? « 4. ›Dial‹ T ...