Just had my S4 Avant plugged into a computer at an Audi gaf to find out if there was a problem with my fuel reading. The guy said the following numbers were important and incorrect when he was running the diagnostics. 00464 He said the 1st 2 digits represented wash wipe and something else, 3rd digit was for 4WD, 4th was for the number of cylinders and the 5th he didn't recognise and should have in fact been a 2. (1 = 4 cylinder car, 2= 6 cylinder car and 3 = 8 cylinder car. Can anyone shed any light...?