I just bought an Audi A4 Avant last week ..and sinec then it is giving problem for auto transmission.Few hours it would run very fine the gears would change in good time autimatically..but after running 12-20 kms after stopping when i Restart it again it doed not chge the gear from 1st to second..n i cheked it chages at an RPM of 40 and from 2nd to third at 80 ..dont knw whats gng on..mechnic day befre renewed the oil tested it was fine but the very next day it started again ..please help me asap..i m very much tensed on this