Minimum time of 10 minutes after engine has been turned off. This is to allow the oil to drain back to the sump. Using of the control will otherwise be misleading.
Procedure:
Scroll through the trip menu and go to "Electronic dipstick display".
Press down "Cruise cancel button" twice within two seconds.
The display will now go back to normal mode.
Scroll through the trip menu again and go to the "Electronic dipstick display".
The graphic will now show an updated value.
Press down "Cruise cancel button" in two seconds.
Turn off the ignition and leave it for 30 seconds for the ECU to shut down.