Ford Mercury Villager 1997 Owner's Manual page 226

Shift-lock Safety Feature
Your vehicle has a special shift-lock safety feature which prevents
you from shifting out of P (Park) without the brake pedal
depressed. To shift the transaxle out of the P (Park) position, the
ignition must be in the ON position and your foot must be
pressing on the brake pedal.
If the shift lever cannot be moved from the P (Park) position with
the brake pedal depressed:
1. Shut the engine off and remove the ignition key.
2. Apply the parking brake.
3. Reinsert the ignition key and turn it to the first position (OFF).
4. Depress the brake pedal, move the gearshift lever to N
(Neutral) and start the engine.
If you need to shift out of P (Park) by using the alternate
procedure described above, it is possible that a fuse has blown
and that your brakelamps may also not be functional. Please refer
to the chapter titled Roadside Emergencies in this Owner Guide
for instructions on checking and replacing fuses.
DO NOT DRIVE YOUR VEHICLE UNTIL YOU VERIFY
THAT THE BRAKELAMPS ARE WORKING.
Backing Up
Before shifting into or out of R (Reverse), you should always
come to a complete stop.
222
WARNING