If it has a rear orifice it's in the rear unit under the roof panel.
No such option was available.
Front wheel drive
In the ceiling housing for the rear A/C.
The switch just pops out of the dashboard.
The brakes on the Villager are as straight forward as the brakes on a 1965 Mercury. Only normal brake tools are required.
The rear seat is not designed to be removed. You can remove the center seat and slide the rear seat forward.
The rear seat is not intended to be removed. You can remove the center seat and slide the rear on forward into it's place.
On a 1997 Mercury Villager : The spare tire is underneath the vehicle , just ahead of the rear bumper You can view the 1997 Mercury Villager owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( starting on page 257 the manual shows with diagrams how to lower the spare tire )
The rear seat isn't designed to be removed. If you have a center bench seat you can remove that by unclipping it, then slide the rear seat forward.
replace the dash control unit
There is no rear heat system, it is A/C only. If only the rear A/C system is affected, it's probably a control or blower issue, or the rear orifice is plugged. Otherwise, the rear A/C is connected to the same system as the front.
On a 2000 Mercury Villager : The washer fluid for the rear liftgate is supplied by the same reservoir as the windshield ( located in the engine compartment )