ACC not available

Several conditions exist which can cause ACC to deactivate or prevent ACC from activating when requested. These conditions include:
• The sensor is blocked, refer to Blocked sensor in this section.
• Brake temperature is high, refer to Hilly condition usage in this
section.
• A failure has occurred in the ACC system or related system.
See also:
Heated seats
WARNING: Persons who are unable to feel pain to the skin
because of advanced age, chronic illness, diabetes, spinal cord
injury, medication, alcohol use, exhaustion, or other physical
conditions ...
CTA and reverse sensing system (RSS) interaction
CTA works along with the reverse sensing system (RSS) (if equipped).
Become familiar with the warning tones of both systems. ...
Panoramic roof deflector (if equipped)
Vacuum the wind deflector cloth to remove insects & loose dirt. Clean
with Motorcraft Professional Strength Carpet & Upholstery Cleaner
(ZC-54). ...
