2011 Mercedes R-Class Owner's Manual - Page 304

302 Flat tire lug wrench, consult an authorized Mercedes-Benz Center. X Roadside Assistance Prepare the vehicle as described (Y page 296). X If a trailer is coupled to the vehicle, uncouple it. X Remove the following items from the stowage well under the trunk floor: Rthe emergency spare wheel40 Rthe wheel bolts for the emergency spare wheel40 Rthe jack Rthe ratchet ring spanner Rthe lug wrench Rthe folding wheel chock Rthe alignment bolt Rthe electric air pump40 X X Fold both plates upwards :. X Fold out lower plate ;. X Guide the lugs on the lower plate fully into openings in base plate =. Secure the vehicle to prevent it from rolling away. Securing the vehicle to prevent it from rolling away G Warning Only jack up the vehicle on level ground or on slight inclines/declines. The vehicle could otherwise fall off the jack and injure you or others. Securing the vehicle on level ground X If your vehicle is equipped with a wheel chock, it can be found in the vehicle tool kit (Y page 294). The folding wheel chock is an additional securing measure to prevent the vehicle from rolling away, for example when changing a wheel. On level ground: place chocks or other suitable items under the front and rear of the wheel that is diagonally opposite the wheel you wish to change. Securing the vehicle on slight downhill gradients 40 Vehicles with an emergency spare wheel.