Ford 1996 Windstar Manual page 176

Make sure the safety belts are free and available for use.
2.
The seat/bed should not be occupied while the vehicle is
moving unless it is in the upright, fully-latched position.
2nd row seat (bed position)
3rd row seat
To convert the seat to a bed:
From the rear of the vehicle, pull down on the release lever
1.
located on the right-hand side of the seat, and at the same
time pull the seatback rearward.
Push down at the top of the seatback until it latches.
2.
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