Ford Mustang Owner's Manual page 78

To Set a Lower Set Speed
Press and hold COAST. Release the switch
when the desired vehicle speed is reached.
OR
Press and release COAST. Each press will
decrease the set speed by 1 mph (1.6 km/h).
OR
Depress the brake pedal. When the desired
vehicle speed is reached, press SET ACCEL.
To Disengage Speed Control
Depress the brake pedal. OR
Depress the clutch pedal.
Disengaging the speed control will not erase the
previously programmed set speed.
To Return to a Set Speed
Press RESUME. For RESUME to operate, the
vehicle speed must be faster than 30 mph
(48 km/h).
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