sdewitt wrote zilch zero nada, at least until low sulfur diesel fuel becomes the standard. The good is a 2.0 TDI from a passat will bolt into a 2000 A4 Avant Quattro... here in the uk we now have the 2.5 180 bhp red/eye tdi Avant Quattro with a new chip this makes 210 bhp +350 +tuq wait till you get that in the us simon