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. ...
Malfunction
Comfort Access may not function properly if it
experiences interference from local radio waves,
e.g., mobile phones.
If this occurs, open or close the vehicle using the
buttons on the remote co ...
Releasing the parking brake manually
In the event of an electrical power loss or electrical
malfunction, you can release the parking
brake manually.
Secure the vehicle against rolling
Before releasing the parking brake manually, ...