The BMW drive trains were top notch up until ... I hate to say it ... the E39M and E46M. After that, it gets sketchy -- there's only so much you can do with naturally aspirated torqueless wonders, and what they did to go farther seemed to throw them off track a bit. The interiors (you know, where I spend my time) just never quite made it (notable exceptions, like the E38 Dinan TT and E39M with Extended Leather). Meanwhile, somewhere in the late 90s, Audi's fit and finish just went through the roof (the C5 Allroad 4.2 continues to absorb abuse with astounding aplomb) -- probably an over-compensation for the electric woes of the early 90s. And also in the late 90s, people swear MBs fit and finish took a dive with the W220 most notably, although I'm far less certain about that. Living daily with an E5E and S55, they feel VERY similar, unlike the MB stuff since '07.
This is all "1,2,3", "3,1,2", "2,1,3" sort of thing -- none are Volvos, Puegeots or Jaguars, so maybe we're slicing the garlic a bit thin (think Paulie in Goodfellas with the sauce). But that's what this site is for -- cars, fellowship and a nice stew of complimentary or contrary opinions. In all, I really think the EPA's CAFE regulations caused the biggest car degradation we've seen. But you know, a planet would be nice.
maw