ACC Unavailable Warning
If the system turns off, and the EVIC displays “Adaptive Cruise Control (ACC) Unavailable”, there may be a temporary malfunction that limits ACC functionality.
Although the vehicle is still drivable under normal conditions, ACC will be temporarily unavailable. If this occurs, try activating ACC again later, following a key cycle. If the problem persists, see your authorized dealer.

Adaptive Cruise Control (ACC) Unavailable Warning
See also:
In The 50 United States And Washington, D.C.
If you believe that your vehicle has a defect that could
cause a crash or cause injury or death, you should
immediately inform the National Highway Traffic Safety
Administration (NHTSA) in addit ...
Hard-Keys
The hard-keys are located below the Uconnect Touch™
screen, in the center of the instrument panel.
Automatic Climate Controls — Hard-keys ...
Chassis
...
