Ford Mercury Villager 1997 Owner's Manual page 107

Controls and Features
Opening the liftgate
Opening the Liftgate Window (If equipped)
To open the liftgate window only, turn the key clockwise. The
window unlatches and the rear wiper falls out of the way. Do not
force the wiper down by hand — it moves when the key is
turned. To close, push downward until it latches.
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