Ford Mystique Owner's Manual page 71

Controls and Features
The childproof locks for the rear door
To set the childproof lock on each rear door, open the rear
door.
Find the lever at the black label with word LOCKED in white
letters. Move the lever toward the inside of the door.
To release the childproof lock, open the rear door from the
outside.
Move the lever toward the outside of the door.
Power Door Locks (If equipped)
If your vehicle has power door locks, the controls to lock the
doors are on the trim panel of the front door. When you close
the doors after you set the door locks, the doors remain locked.
If the power mechanism fails, the manual door lock will
automatically override the power controls.
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