2008 Mercedes R-Class Owner's Manual - Page 495

Practical hints Flat tire Prevent the vehicle from rolling away by blocking wheels with wheel chocks or other sizeable objects. One wheel chock is included with the vehicle tool kit ( page 469). Warning! Changing wheel on a level surface Always firmly set parking brake and block wheels with wheel chocks or other sizeable objects before raising vehicle with jack. Do not disengage 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. G 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. Changing rear wheel on passenger side (Example illustration) Place the wheel chock in front of and another sizeable object behind the wheel that is diagonally opposite to the wheel being changed. 494