MPG display - Not all S3s have the miles per gallon readout set to US gallons and miles. Some came here (to the U.S) set for kilometers and imperial gallons. To check/change it , do this:hold down all three buttons with the ignition on, but engine not running. Then you can select km, miles & UK gallons or miles & US gallons. In the US the setting you want is #3, miles per hour and US gallons.