Booked my B5 S4 avant in to Power Developments for a full service on Monday as I see they have good reviews on this forum.
I will of course up-date you with my findings next week:
while on the subject does anyone have experience of them?
Wohoo! picked up my B6 avant today and I'm in love already. 79k on a 53 plate, full history, needs a good clean but no rattles on cold start up and no clutch judder, fingers crossed.