2009 Mercedes SL-Class Owner's Manual - Page 321

Practical hints Flat tire jack arm is fully inserted in the jack tube. The jack must always be vertical when in use, especially on inclines or declines. The jack is intended only for lifting the vehicle briefly for wheel changes. It is not suited for performing maintenance work under the vehicle. To help avoid personal injury, use the jack only to lift the vehicle during a wheel change. Never get beneath the vehicle while it is supported by the jack. Keep hands and feet away from the area under the lifted vehicle. Always lower the vehicle onto sufficient capacity jackstands before working under the vehicle. Always firmly set the parking brake and block the wheels with wheel chocks or other sizeable objects before raising the vehicle with the jack. Do not disengage the parking brake while the vehicle is raised. Make sure that the ground on which the vehicle is standing and where you place the jack is solid, level and not slippery. If necessary, use a large underlay. On slippery surfaces, such as tiled floors, you should use a non-slip underlay, for example a rubber mat. Do not use wooden blocks or similar objects to support the jack. Otherwise the jack may not be able to achieve its loadbearing capacity if it is not at its full height. Never start the engine when the vehicle is raised. Also observe the notes on the jack. X G Warning! Only jack up the vehicle on level ground or on slight inclines/declines. Otherwise, the vehicle could fall off the jack and injure you or others. Prevent the vehicle from rolling away by blocking wheels with wheel chocks (not included) or other sizeable objects. Place one wheel chock or other sizeable object in front of and another wheel chock or other sizeable object behind the wheel that is diagonally opposite to the wheel being changed. When changing wheel on a level surface: X 1 Wheel wrench X Always try lifting the vehicle using the jack on a level surface. However, should circumstances require you to do so on a hill, place a wheel chock or other sizeable object and the other wheel chock or sizeable object as follows: X On wheel to be changed, loosen but do not yet remove the wheel bolts (approximately one full turn with wrench 1). The jack support tubes are located directly behind the front wheel housings and in front of the rear wheel housings. Place wheel chocks or other sizeable objects on the downhill side blocking both wheels of the axle not being worked on. G Warning! When turning the wheel wrench to loosen the wheel bolts, make sure you position Z 319