When I did it, I just followed pretty much what this guy did, except with the aerosol seafoam:
http://www.1addicts.com/forums/showp...4&postcount=10
This way it works for the DI engine.
As far as I know, Seafoam, MCCC, and drosselklappenreiniger are pretty much the same thing, functionally. Am I wrong?
I think the next step is, like BrokenVert said, to just soak the whole damn thing including the intake valves in a seafoam-like product. I think I'll do all this next time I change the spark plugs at about 60K. I'm scared to see what I'll find. It's probably partly in my head, but the car isn't feeling as fast as it used to. Then again, I haven't done any power mods in a long time.