See also:

Setting a speed
Use the or buttons set the vehicle's current speed. The set speed is shown in the display. NOTE Cruise control cannot be engaged at speeds below 20 mph (30 km/h). ...

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 ...

Disconnecting an external device
The external device is automatically disconnected from the audio system if it is moved out of range ...