Low speed automatic cancellation

ACC is not functional at vehicle speeds below 18 mph (30 km/h). Once the vehicle speed drops below 18 mph (30 km/h), an audible alarm will sound, the head’s up display will flash and the automatic braking will be released.
See also:
2008 Lincoln MKX Review
The Lincoln MKX is a midsize SUV — or CUV, as the company likes to call it,
to reflect that it's a car-based crossover. The MKX provides a refined, smooth
driving experience in a people-hauler tha ...
Cross traffic alert (CTA) system operation
The CTA system warns the driver of approaching vehicles when R
(Reverse) is selected and the vehicle is backing out of a front-in parking
spot. It sounds a series of tones and flashes the BLIS ind ...
Roll Stability Control™ (RSC )
Roll Stability Control™ (RSC ) may help to maintain roll stability of the
vehicle during adverse maneuvers. RSC operates by detecting the
vehicle’s roll motion and the rate at which it changes and ...
