Chrysler 300 2010 Owner's Manual page 173

When the condition that deactivated the system is no
longer present, the system will return to the "CRUISE
OFF" state and will resume function by simply reactivat-
ing it.
NOTE: Installing a vehicle front-end protector or an
aftermarket grille or modifying the grille is not recom-
mended. Doing so may block the sensor and inhibit ACC
operation.
ACC Unavailable Warning
If the system turns off, and the EVIC displays ACC
UNAVAILABLE, there may be a temporary malfunction
that limits ACC functionality. Although the vehicle is still
drivable under normal conditions, ACC will be tempo-
rarily unavailable. If this occurs, try activating ACC again
later, following a key cycle. If the problem persists, see
your authorized dealer.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 173
Service ACC Warning
If the system turns off, and the EVIC displays "SERVICE
ACC," it indicates there is an internal system fault.
Although the vehicle is still drivable under normal
conditions, have the system checked by an authorized
dealer.
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