I said this before, but I will throw my 5p into this pot again. I've got no doubt Mackies are good in what they do, BUT... Audi's master tech guys I know and who know these cars in and out aslways said to me one thing when it comes to gearbox service on 8's - avoid oil change on these gearboxes using the sucking machine. This can cause problems and sometimes big ones.
Really Marcin? - wouldn't you expect an Audi master tech to say that? Personally, I'd trust Mackies ahead of an Audi employee any day. What problems have they described?