2011 Cadillac DTS Owner's Manual - Page 180

Highway Exit Ramps Using ACC on Hills and When Towing a Trailer { WARNING: Adaptive Cruise Control may lose track of the vehicle ahead and accelerate up to your set speed while entering or on highway exit ramps. You could be startled by this acceleration and even lose control of the vehicle. Disengage Adaptive Cruise Control before entering a highway exit ramp. Do not use Adaptive Cruise Control while entering or on exit ramps. Other Vehicle Lane Changes How well ACC will work on hills and when towing a trailer depends on your vehicle's speed, vehicle load, traffic conditions and the steepness of the hills. It may not detect a vehicle in your lane while driving on hills. When going up steep hills, you may want to use the accelerator pedal to maintain your vehicle's speed. When going downhill, especially when towing a trailer, you may want to brake to keep your speed down. Applying the brake disengages the system. You may choose not to use ACC on steep hills, especially when towing a trailer. Disengaging ACC If another vehicle enters the same lane as you, ACC will not detect the vehicle until it is completely in the lane. Be ready to take action and apply the brakes yourself. To turn off the system, apply the brake pedal, press the cancel button, or press the ACC button. 4-22