Mercury Montego 2007s Owner's Manual page 210

Roadside Emergencies
To help prevent the vehicle from moving when you change a tire,
be sure to place the transaxle in P (Park), set the parking brake
and block (in both directions) the wheel that is diagonally opposite
(other side and end of the vehicle) to the tire being changed.
If the vehicle slips off the jack, you or someone else could be
seriously injured.
2. Place gearshift lever in P (Park),
turn engine OFF, and block the
diagonally opposite wheel.
3. Remove wheel cover (if
equipped) with the lug wrench tip
and loosen each wheel lug nut
one-half turn counterclockwise but
do not remove them until the wheel
is raised off the ground.
210
2007 Montego (mgo)
Owners Guide (post-2002-fmt)
USA (fus)