See also:

System limits
Sudden tire damage Sudden serious tire damage caused by external influences cannot be indicated in advance.◀ A natural, even pressure loss in all four tires cannot be detected. Therefore ...

Switching off automatically
System switches off: above approx. 9 mph/ 15 km/h. Switch on the system again if necessary. ...

Camera monitoring: Lane Departure Warning System and Collision Warning
The Lane Departure Warning System available for the new BMW 3-Series Sedan is activated at speeds above 70 km/h (43 mph) and warns the driver if he unintentionally strays out of his lane. The syst ...