2011 Mercedes G-Class Owner's Manual - Page 235

Flat tire Raising the vehicle G Warning! When jacking up the vehicle, only use the jack which has been specifically approved by Mercedes-Benz for your vehicle. The jack is designed exclusively for jacking up the vehicle under the axle housing. Make sure the jack is positioned correctly under the axle housing. 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 engage 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 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. 233 X ; Notch on pump lever X Assemble the pump lever for the jack. It can be found with the vehicle tool kit (Y page 229). X Turn pressure release screw = clockwise as far as it will go using notch ; on the pump lever. Pressure release screw = is closed. Z Roadside Assistance Using lug wrench :, loosen the bolts on the wheel you wish to change by about one full turn. Do not unscrew the wheel bolts completely.