Yea where can ifind these service actions. I would like to print them out and take them to the dealer. And i dont care what the dealer says. Even if they say the sound is normal and it posses no risk. That is bullcrap. Ive had alot of BMWs and never even once have i ever heard a noise like that before. And how can a loud clunk be normal. Something that is not right is causing. and now mine does it when driving hard in corners also. Does anyone have the right answer for this problem or a real fix. My service dept at my dealer are a bunch of idiots. I need help.