06 A4 2.0T, 62k. Engine Sounds like a diesel! I just got an oil change and thought it might solve the problem used mobile 1. The car drive fine but it idles at 900k with a rough sound. Cleaned out the MAF but the code came back need to replace. What else could be causing this sound. Any tips, advice? Just want to make sure its not catastrophe, outta of warranty! Posted a link heres what it sounds like.

http://www.youtube.com/watch?v=WqkWb_OljUc