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:
Interior
Inside the cabin, big, plush seats welcome the driver and passengers. There's
a giant center armrest with storage between the driver and the front passenger
seat, as well as one splitting the seco ...
The Inside
I'm not a fan of all-gray interiors, which seem drab to me — even more so
than all-black designs — but that's what our MKZ had. Getting past my own
preferences, however, let me appreciate a cabin ...
Motorcraft part numbers
Refer to scheduled maintenance information for the appropriate
intervals for changing the spark plugs.
Replace the spark plugs with ones that meet Ford material and
design specifications for ...
