As the search on here seems to be a bit on the senile side at the moment, let's try and assemble some of the excellent info on this very forum. Do please add any good threads you find/remember:

Audi:

A3:

A3 3.2 quattro

RS4 B5:
Thinking of buying a 2000 RS4, need advice

RS4 B7:
HERE
HERE
RS4 Avant???
B7 Audi RS4 info required
RS4 Purcahse advice
RS4; Avant or saloon?

S4 B5:
B5 S4 info

S4 B6:
BMW 330ci to S4 Avant


TT MK1:
TT reliability on a 99


VW:

Golf VR6:
HERE

Golf GTI MKV:
Mk V Golf GTI
MKV GTI or R32
MkV Golf GTI/R32

Golf R32 MKV:

To R32, or not to R32?

Phaeton:
VW Phaeton, why shouldn't I buy one?

The great DSG/S-Tronic/Multitronic/Tiptronic/Manual debate:
A3 DSG FWD vs quattro
Audi's Multitronic gearbox
Audi A4 TDI automatic; multi or DSG?
http://www.pistonheads.com/gassing/topic.asp?h=0&t=318244&nmt=launch%20control%20on%20mk5%20golf%20gti%20with%20dsg?
Is DSG worth it?



HERE