Lincoln 1997 Town Car Owner's Manual page 205

The key wrench has a registration number attached
to it. Keep the registration number in a safe place.
Complete the registration card and return it to the
manufacturer as soon as you buy the vehicle. To
replace the key wrench, send the I.D. card to the
manufacturer.
Anti-Theft Wheel Lug Nuts
(If equipped)
If your vehicle has this option, one of the lug nuts
on each wheel locks and must be unlocked with a
special key. The key and registration card are
attached to the lug wrench and stored with the
spare tire. If you lose the key, send the registration
card to the manufacturer (not the dealer) to get a
replacement key.
NOTE: If entire lug wrench/lug nut key assembly
is lost, see your nearest Ford or Lincoln-Mercury
dealer who has access to a master set of keys.
NOTE: DO NOT USE A POWER IMPACT
WRENCH ON THE LUG NUT KEY.
The anti-theft lug nut and key
Removing the anti-theft lug nut
Insert the key over the locking lug nut. Make sure
that you hold the key square to the lug nut. If you
hold the key on an angle, you may damage the key
and the lug nut.
Place the lug nut wrench over the lug nut key and
apply pressure on the key with the wrench. Turn
the wrench in a counterclockwise direction to
remove the lug nut.
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