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:
MKZ in the Market
Despite the MKZ's positive attributes, it's going to have a tough go of it in
the market. The competition is strong and getting stronger; besides the
aforementioned TL and ES, the MKZ is up agains ...
Disengaging adaptive cruise control
Press the brake pedal to disengage the adaptive cruise control. CRUISE
CANCELLED will be displayed in the message center.
Disengaging the adaptive cruise control will not erase your previous set ...
Emission control system
WARNING: Do not park, idle, or drive your vehicle in dry grass
or other dry ground cover. The emission system heats up the
engine compartment and exhaust system, which can start a fire.
WARNING: ...
