Hi guys, Just joined and am really enjoying my 335i, :D but one thing that is worrying me is that after taking the revs high, say for example to 5k and then releasing the throttle, I hear a strange metallic clashing type of noise until 3k revs. Is this a sign that my turbos maybe be starting to go wrong? Also when cold starting first thing in the morning the car gives a similar but not same metallic noise when idle. It almost sounds like the edge of a fan blade hitting something!!! :blink: I have bought a warranty but just wanted to check with the experts before going to the idiots, lol. :) Also one more thing, I want to change my 225/35/19 and 255/30/19s to run flats and am veering towards the Good year Eage F1 Asymetric 2's, are these good and should I notify my insurance as one tyre shop said that I may not be covered as the car is built for only run flats and if i change the car will behave uncontrollably , which is contrary to the info I have read on line, im so confused!?!! HELP! :wacko: Thanks in advance. :)