Interesting that he comments on the noise in the interior cabin. I’ve driven my C4 S almost 5000 miles, and can honestly say the sound hasn’t bothered me a bit.  My only irritation with the car so far is that the door handle sensors are totally unpredictable. When you have something rather bulky in one hand, and you put the other hand under the door handle, it’s pretty frustrating when it doesn’t open like it supposed to.