[Rick]

I think its gonna be an intake off and manual clean to do it properly if im honest. New gaskets and injector kits and elbow grease.
Every website other than the related topics suppliers say that it wont touch the build up really. It might do a bit but so minimul its not worth it.

But then you have to ask the question, are they saying that so they can charge £800 like AMD in essex quoted me to do the job plus parts (£191 genuine audi parts) and 3 days work.
Or do these mobile cleaning thingies offer a genuine positive service for a minimal fee and an hour or so of your time, or a placebo so you "think" your car runs better.
We just dont know as no one has done a real genuine back to back comparison.