Activating functions during a call
The following functions are available during a call:
End call
Micro. off
Keypad (show to send DTMF tones) 
Add callHands-free
Transfer the call, e.g. to Front, Rear or All seats.
Private mode
Transfer the call the telephone or headphones, for example.
Select a function.
Please observe that the functions and symbols can vary depending on the vehicle equipment.