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:
Ready Alert Braking
Ready Alert Braking may reduce the time required to
reach full braking during emergency braking situations.
It anticipates when an emergency braking situation may
occur by monitoring how fast the ...
Dual Dry Clutch (6-Speed C635 Ddct) Automatic Transmission
This vehicle must be towed with the front wheels OFF
the ground (using a flatbed truck, towing dolly, or wheel
lift equipment with the front wheels raised). The manufacturer
recommends towing yo ...
Wind Buffeting
Wind buffeting can be described as the perception of
pressure on the ears or a helicopter-type sound in the
ears. Your vehicle may exhibit wind buffeting with the
windows down, or the sunroof (i ...
