The speed control buttons (located on the right side of the steering wheel) operates the ACC system.
Adaptive Cruise Control Buttons
1 - NORMAL (FIXED SPEED) CRUISE CONTROL ON/OFF
2 - SET+/ACCEL
3 - RESUME
4 - SET-/DECEL
5 - DISTANCE SETTING - INCREASE
6 - ADAPTIVE CRUISE CONTROL (ACC) ON/OFF
7 - DISTANCE SETTING - DECREASE
8 - CANCEL
NOTE: Any chassis/suspension or tire size modifications to the vehicle will effect the performance of the Adaptive Cruise Control and Forward Collision Warning System.