The concept
If the vehicle is equipped with Active Cruise Control with Stop & Go, the collision warning is controlled via the cruise control radar sensor.
The system issues a two-phase warning of a danger of collision at speeds above approx.
10 mph/15 km/h. The time of these warnings may vary depending on the current driving situation.
The collision warning is available even if cruise control has been deactivated.

It responds to stationary or moving objects that are within the detection range of the radar system.
When the vehicle is intentionally brought into contact with a vehicle, the collision warning is delayed to avoid false warnings.
See also:
Automatic deactivation during forward travel
The system switches off when a certain driving
distance or speed is exceeded.
Switch the system back on if necessary. ...
Roadside parking lamps
The vehicle can be illuminated on one side.
Switching on
With the ignition switched off, press the lever
either up or down past the resistance point for
approx. 2 seconds.
Switching off
Brie ...
Switching on/off manually
Press the button.
On: the LED lights up.
Off: the LED goes out.
If Top View is displayed, switch on the backup
camera via the iDrive. ...
