Loudnes only when cold so I cope with it. 150 I could reinstall a pretty decent system so not forking out that cash for a fix. Audi should absorb the cost but that's a perfect world and we don't live in one. I follow the forum and am aware of this problem and the turbo loss problem as well. Will fix the air flow sensor when I find a decent shop that can do it.
Cheers for the reply

Dave