2000 Mercury Mystique Owner's Manual - Page 60

Controls and features To set a speed Press Set Acc and release. For speed control to operate, the speed control must be on and the vehicle speed must be greater than 48 km/h (30 mph). If you drive up or down a steep hill, your vehicle speed may vary momentarily slower or faster than the set speed. This is normal. Speed control cannot reduce the vehicle speed if it increases above the set speed on a downhill. If your vehicle speed is faster than the set speed while driving on a downhill in overdrive, you may want to shift to the next lower gear to reduce your vehicle speed. Res Set Acc Coast If your vehicle slows down more than 16 km/h (10 mph) below your set speed on an uphill, your speed control will disengage. This is normal. Press Res to re-engage it. Res Set Acc Coast 60