Mercury 1996 Sable Manual page 252

When one of the front wheels is off
the ground, the transaxle alone will
not prevent the vehicle from moving
or slipping off the jack, even if the
vehicle is in P (Park). To prevent the
vehicle from moving when you
change a tire, block (in both
directions) the wheel that is
diagonally opposite to the tire being
changed. If the vehicle slips off the
jack, you or someone else could be
seriously injured.
2. Get out the spare tire and jack.
To avoid injury, never run the engine
with one wheel off the ground when
changing a tire, or at any other time.
The wheel still on the ground could
cause the vehicle to move.
3. Remove wheel covers or aluminum wheel
ornaments with the tapered end of a wheel
nut wrench. Insert the handle of the wrench
between the wheel and ornament and twist
it against the inner wheel cover flange.
4. Loosen each wheel lug nut one-half turn
counterclockwise, but do not remove them
until the tire is raised off the ground. You
should pull up on the handle rather than
push to develop maximum force to loosen
wheel lug nuts. See Anti-Theft Wheel Lug
Nuts later in this chapter for information on
removing anti-theft lug nuts.
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