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:
High beams
Pull the lever fully past the detent
to activate. Pull the lever fully again
to deactivate. ...
Tires
Tires are designed to give many thousands of miles of service, but they
must be maintained in order to get the maximum benefit from them. ...
3.5L V6 EcoBoost™ engine
1. Engine coolant reservoir
2. Brake fluid reservoir
3. Battery
4. Power distribution box
5. Air filter assembly
6. Automatic transmission fluid dipstick (out of view)
7. Engine oil dips ...
