[ainarssems]

I think I actually know somebody who started offering this service recently, I think he is offering this companies solution: http://hhoenginecarbonclean.co.uk/
currently at £70. My S8 is clean as a whistle but I might be tempted to do it for scientific reasons just to see how much difference it makes on 2.5TDI A6 but I am held back because I think it will be £70 wasted. I was going to take off intake and clean it mechanically 2 years ago on A6 but had a look and while there is some carbon buildup it's nowhere near as bad as others I have seen so I let it be.