hi guysi meant 1996 or 1997 or 1998 versioncan someone plz tell me the difference of steptronic & tiptronic on this E39 model?because it see on motortrader , some put tiptronic, some put shiftronic, some put steptronic, so can i know what exact gear box type come with for E39's early batch 520/523/528? i m looking for the model which has tiptronic/steptronic also is single VANOS engine working fine ? thanksDave