2010 Mercedes C-Class Owner's Manual - Page 321

Flat tire away from the area under the lifted vehicle. Always lower the vehicle onto sufficient capacity jackstands before working under the vehicle. Always engage the parking brake firmly 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 load-bearing 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 319 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. X Prevent the vehicle from rolling away by blocking wheels with wheel chocks or other sizeable objects. When your vehicle is equipped with a wheel chock, it is included with the vehicle tool kit (Y page 268). For information on setting up the collapsible wheel chock, see (Y page 269). Place a 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. On the wheel to be changed, loosen but do not yet remove the wheel bolts (approximately one full turn with wheel wrench :). The jack take-up brackets are located directly behind the front wheel housings and in front of the rear wheel housings. G Warning! When changing a wheel on a level surface: X The jack is designed exclusively for jacking up the vehicle at the jack take-up brackets. Make sure the jack arm is fully seated in the jack take-up bracket. If you do not position the jack correctly in the jack take-up bracket, the vehicle can fall off the jack and seriously or fatally injure you or others. ! Do not position the jack on the body of the vehicle, as this may cause damage to the vehicle. Always try lifting the vehicle using the jack on a level surface. However, should circumstances require you to do so on a hill: X Place wheel chocks or other sizeable objects on the downhill side in front of both wheels on the side opposite to the side on which the wheel is to be changed. Z Practical hints