Mercury 1996 Sable Manual page 153

To set the childproof lock on each rear door,
open the rear door.
Find the lever inside the label. Move the lever
up to the locked symbol.
To release the childproof lock, open the rear
door from the outside. Move the lever down to
the unlocked symbol.
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 ever fails, the
manual door lock will override the power
controls.
The power locks on the driver's door
If the key is left in the driver's or passenger's
outside lock cylinder for a period of time, the
power door locks may cycle. This is a protective
feature and will not harm the locks. When the
key is removed, the locks will function normally.
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