See also:

Oil volume
...

Passenger compartment blower
Approximately 50 minutes after the ignition is turned off, the blower may come on automatically, and run for seven minutes, to remove condensation in the A/C evaporator. ...

Summary
The camera is activated when the gear selector is moved to R (this can be changed in the MY CAR menu) and the image is shown on the center console display. When backing up, two solid lines are ...