The recommended tyre pressure is correctly set for the respective operating condition on each of the wheels More.
Restart the tyre pressure monitoring system in the following situations:
The tyre pressure has changed.
The wheels or tyres have been changed or newly fitted.
The Use current pressures as new reference values? message appears in the multifunction display.
The Tyre press. monitor restarted message appears in the multifunction display.
Current warning messages are deleted and the 
yellow warning lamp goes out.
After you have driven for a few minutes, the system checks whether the current tyre pressures are within the specified range. The current tyre pressures are then accepted as reference values and monitored.
Notes on tyre pressure More