188 Driving mode X Press "reduce pressure level" button ? . A tone sounds and Emergency pressure level is selected. The corresponding target tyre pressure is displayed. The Emergency pressure level flashes until the preset tar- get tyre pressure has been reached. load fully laden = is automatically selec- ted. X Press the 9 button on the multifunction steering wheel. The selected vehicle load is saved. The tyre pressures are only adjusted if different val- ues for the axle load are specified in the tyre pressure table ( Y page 342). X To cancel pressure level selection: press "increase pressure level" button : or "reduce pressure level" button ? again.
Driving mode Selecting the vehicle load Tyre pressure control manual mode General notes In manual mode, you can freely set the tyre pressure. When setting, always observe tyre size, axle load and speed. If you exceed the permissible speeds in manual mode, no warn- ing tone sounds. Also, the tyre pressure con- trol system does not automatically increase the tyre pressure. Adjusting via the on-board computer X Make sure that the automatic tyre pressure control mode is activated ( Y page 186). X Using the u or t button on the mul- tifunction steering wheel, scroll to в oper- ation and maintenance. X Using the r or s button on the mul- tifunction steering wheel, scroll to the Tyres menu window.
X Press the 9 button on the multifunction steering wheel. Load appears in the menu window. X Select the current vehicle load using the r or s button on the multifunction steering wheel: : Current tyre pressure, left front wheel ; Current tyre pressure, right front wheel = Preset target tyre pressure, front axle tyres ? Preset target tyre pressure, rear axle tyres A Current tyre pressure, right rear wheel B Current tyre pressure, left rear wheel R : empty R = fully laden If the engine has cooled to the outside tem- perature and you start the engine, vehicle R ; partially laden (half load) X Make sure that the automatic tyre pressure control mode is deactivated ( Y page 186).
X Using the u or t button on the mul- tifunction steering wheel, scroll to в oper- ation and maintenance.