The concept

Two radar sensors below the rear bumper monitor the area behind and next to the vehicle at speeds above approx. 30 mph/50 km/h.
The system indicates whether there are vehicles in the blind spot, arrow 1, or approaching from behind on the adjacent lane, arrow 2.
The lamp in the exterior mirror housing lights up dimly.
Before you change lanes after setting the turn signal, the system issues a warning in the situations described above.
The lamp in the housing of the exterior mirror flashes and the steering wheel vibrates.
See also:
Panic mode
In dangerous situations, trigger the alarm system:
Press the button on the remote
control for at
least 3 seconds.
To switch off the alarm: press any button. ...
Closing the windows and glass
sunroof/panoramic glass sunroof
Driving with the glass sunroof/panoramic glass
sunroof and windows open results in increased
air resistance and raises fuel consumption. ...
Vehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equipment
is also described that is not available in a vehicle, ...
