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:
Switching off automatically
The system switches off and the LED goes out:
After approx. 33 ft/10 m when driving forward.
Above approx. 9 mph/15 km/h when driving
forward.
Switch on the system again if necessary. ...
Tire tread
Summer tires
Do not drive with a tire tread depth of less than
0.12 in/3 mm.
There is an increased danger of hydroplaning if
the tread depth is less than 0.12 in/3 mm.
Winter tires
Do not driv ...
1975: the first generation - premiere as a two-door sedan with high-output
four-cylinder engines
The presentation of the first BMW 3-Series in July 1975 saw BMW write a new
chapter into the automotive history books. The two-door sedan wasted no time in
leaving its own distinctive stamp on the ...
