Handy List of General Technical Service Tips for A4/A4 Cabriolet (B5 chassis) 1997-2001 models
https://www.pelicanparts.com/techarticles/Audi_tech/Audi_Tech_Index.htm#start
Handy List of General Technical Service Tips for A4/A4 Cabriolet (B6 chassis) 2002-2008 models
http://www.pelicanparts.com/techarticles/Audi_A4_B6_Index.htm