See also:

Situations where ACC may not function optimally
WARNING • The radar sensor has a limited field of vision. In some situations it may detect a vehicle later than expected or not detect other vehicles at all. • If ACC is not functioning proper ...

Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead may make the visual warning signal in the windshield difficult to see ...

Automatic relocking
If the doors are unlocked, the locks will automatically reengage (re-lock) and the alarm will rearm after 2 minutes unless a door or the trunk has been opened. ...