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:
Applying your current speed as the limit
1. "Settings"
2. "Speed"
3. "Select current speed"
The system adopts your current speed as the
limit. ...
Starting destination guidance
1. "Navigation"
2. Make a destination entry.
3. "Accept destination"
4. "Start guidance"
The route is shown on the Control Display.
The distance to the destinati ...
Driving tips
This section provides you with information useful
in dealing with specific driving and operating
conditions. ...
