2007 Cadillac DTS Owner's Manual - Page 180

Approaching and Following a Vehicle The Vehicle Ahead symbol is located on the top of the instrument panel to the right of the driver. {CAUTION: When the Adaptive Cruise Control radar is blocked by snow, ice, or dirt, it may not detect a vehicle ahead. Adaptive Cruise Control may not have time to slow your vehicle enough to avoid a collision. Do not use Adaptive Cruise Control when the radar is blocked by snow, ice, or dirt. Keep your radar clean. See "Cleaning the System" later in this section. Adaptive Cruise Control will automatically slow your vehicle down when approaching a slower moving vehicle. It will then adjust your speed to follow the vehicle in front at the selected follow distance. Your speed will increase or decrease to follow the vehicle in front of you but will not exceed the set speed. It may apply limited braking, if necessary. When braking is active, your brake lights will come on. Braking may feel or sound different than if you were applying the brakes yourself. This is normal. The Vehicle Ahead symbol will only appear when a vehicle is detected in your path. If this symbol does not appear, or disappears briefly, Adaptive Cruise Control will not respond to vehicles you may see ahead. 180