See also:

Symbols and messages in the display
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The alarm system
The alarm is automatically armed whenever the vehicle is locked with the remote key or optional Personal Car Communicator. When armed, the alarm continuously monitors a number of points on the ...

Muting
Audio for the rear screens can be muted from the front center control panel. This function can be activated under RSE settings Mute as explained in points 2-4 in the section "Selecting ...