2009 Mercury Mariner Owner Guide 2nd Printing (Spanish) - Page 583

Roadside Emergencies Tire change procedure WARNING: When one of the front wheels is off the ground, the transmission alone will not prevent the vehicle from moving or slipping off the jack, even if the vehicle is in P (Park). WARNING: To help prevent the vehicle from moving when you change a tire, be sure the parking brake is set, then block (in both directions) the wheel that is diagonally opposite (other side and end of the vehicle) to the tire being changed. WARNING: If the vehicle slips off the jack, you or someone else could be seriously injured. WARNING: Do not attempt to change a tire on the side of the vehicle close to moving traffic. Pull far enough off the road to avoid the danger of being hit when operating the jack or changing the wheel. 1. Block the diagonally opposite wheel. 2. Loosen each wheel lug nut one-half turn counterclockwise but do not remove them until the wheel is raised off the ground. 236 2009 Mariner (mrn) Owners Guide, 2nd Printing USA (fus)