Lincoln 1997 Continental Owner's Manual page 76

The speed control switches on the steering
wheel
To Turn Speed Control Off
Press OFF, OR
Turn off the vehicle ignition.
Once speed control is switched off, the previously
programmed set speed will be erased.
72
To Turn Speed Control On
Press ON
To Set a Speed
Press SET ACCEL. For speed control to operate, the
speed control must be ON and the vehicle speed
must be greater than 30 mph (48 km/h).
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 downhill in j (Overdrive), you may want
to shift to the next lower gear to reduce your
vehicle's speed.
If your vehicle slows down more than 10 mph
(16 km/h) below your set speed on an uphill, your
speed control will disengage. This is normal.
Pressing RES (Resume) will re-engage it.