I had an oil change at 20000km when I purchased the 320I from a Porsche dealer. They reset the computer when the car was serviced. Since then the readout tells me that in 14000 km I have to do "something" I have done 3000 km since then and the readout is still on 1400km. Shouldnt this count backwards as kms are travelled until the kms have been reached for the particular action required. The next oil service shows 38000km. This must mean do it at 38000kms contrary to the book which says this readout is how many kms till the next service and counting down as we go. ???? Confused....anyone shed some light on this please.