2007 Cadillac STS Owner's Manual - Page 200

Engaging Adaptive Cruise Control With the Set Button {CAUTION: If you operate Adaptive Cruise Control without your Head-up Display (HUD) properly adjusted, your Adaptive Cruise Control settings may not be visible. You could forget your settings and be startled by Adaptive Cruise Control response and even lose control. Keep your HUD on and properly adjusted when using Adaptive Cruise Control. The set speed is selected by the driver. This is the speed you will travel if there is no vehicle detected in your path. {CAUTION: If you leave your Adaptive Cruise Control switch on when you are not using cruise, you might hit a button and go into cruise when you do not want to. You could be startled and even lose control. Keep the Adaptive Cruise Control switch off until you want to use cruise control. 200