Mercury 1996 Cougar Owner's Manual page 99

The speed control switches on the steering wheel
To set the speed control:
1. Press and release the ON switch.
2. Accelerate to the desired speed above
30 mph (50 km/h) using the accelerator
pedal.
3. Press the SET ACCEL switch and release it
immediately to set your speed. If you keep
this switch pressed, your speed will continue
to increase.
4. Take your foot off the accelerator pedal.
Your vehicle will maintain the speed you set.
If you drive up or down a steep hill, your
vehicle may momentarily slow down or speed
up, even though the speed control is on. This is
normal.
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