Ford Mercury Villager 1997 Owner's Manual page 265

If you have optional cast-aluminum wheels, remove the wheel
cap to gain access to the lug nuts. Insert the tapered end of the jack
handle behind the notch in the wheel cap and gently pry it off.
To replace it, press it back on. You must line up the raised circle on
the back of the wheel cap with the indented area on the wheel
in order to press the wheel cap on.
Removing the optional wheel cap
4. Fit the hex-shaped end of the lug wrench over the wheel lug nuts
and loosen them one-half turn (counterclockwise). Do not
remove the wheel lug nuts until you raise the tire off the ground.
If your vehicle has the optional locking lug nuts, you must
use the lug nut removal tool provided with your vehicle's tool
kit.
Roadside Emergencies
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