Switching the microphone to mute
When a call is active, the microphone can be muted.
1. "Telephone".
2. "Active calls".
3. 
"Microphone mute"
A microphone that has been switched to mute is automatically reactivated:
▷ When a new connection is established.
▷ When switching between call parties.
See also:
Switching the warning function on/off
Press the button
On: the LED lights up.
Off: the LED goes out.
The state is stored for the remote control currently
in use. ...
System limits
Check the traffic situation as
well
PDC cannot serve as a substitute for the
driver's personal judgment of the traffic situation.
Check the traffic situation around the vehicle with your own e ...
At a glance
These overviews of buttons, switches and
displays are intended to familiarize you with your
vehicle. You will also become quickly acquainted
with the available control concepts and options. ...