2011 Mercedes GLK-Class Owner's Manual - Page 252

250 Flat tire G Warning Only use genuine Mercedes-Benz wheel bolts. Other wheel bolts may come loose. Do not tighten the wheel bolts when the vehicle is raised. Otherwise, the vehicle could fall off the jack. X X Make sure that the base of the jack is positioned directly under the jacking point. Roadside Assistance Turn ratchet ring spanner ? until jack = sits completely on jacking point ; and the base of the jack lies evenly on the ground. X Turn ratchet ring spanner ? until the tire is raised a maximum of 1.2 inches (3 cm) off the ground. : Wheel bolts for all wheels supplied by the factory ; Wheel bolts for the "Minispare" Removing a wheel X emergency spare wheel Unscrew the wheel bolts. ! Do not place wheel bolts in sand or on a dirty surface. The bolt and wheel hub threads could otherwise be damaged when you screw them in. X Remove the wheel. Mounting a new wheel G Warning! Always replace wheel bolts that are damaged or rusted. Never apply oil or grease to wheel bolts. Damaged wheel hub threads should be repaired immediately. Do not continue to drive under these circumstances! Contact an authorized Mercedes-Benz Center or call Roadside Assistance. Incorrect wheel bolts or improperly tightened wheel bolts can cause the wheel to come off. This could cause an accident. Make sure to use the correct wheel bolts. ! Always use wheel bolts ; to mount the collapsible spare wheel. Using other wheel bolts to mount the collapsible spare wheel could damage the brake system. G Warning Make sure to use the original length wheel bolts when remounting the original wheel after it has been repaired. X Clean the wheel and wheel hub contact surfaces. ! To prevent damage to the paintwork, hold the wheel securely against the wheel hub while screwing in the first wheel bolt.