No joy in General Section with this thread:

http://www.pistonheads.co.uk/gassing/topic.asp?h=0... A6 Avant 3.0TDi OR BMW 535D Msport Touring?

So posted here (and in audi forum) hoping for more feedback.

Cheers

Editted to add: genius, I know not how I made this post a wiki. Upgrade user