Ok, so I have a 2005 s4 (not 2005.5) with 99,000 miles on it. When I go out in the morning and start my car, it makes a raspy noise for a second or two then it goes away. The noise is pretty loud and I get worried when I start it. After a couple seconds the car sounds and runs fine. The other problem I have is if I drive around town and then turn the car off for a few minutes. When I restart it and it is idling, it feels like the engine is misfiring. When I put it in drive and start driving, it runs like normal. Any help would be appreciated because I now live about 200 miles from the nearest audi dealership. Oh yeah, and I just got the oil changed last week and I don't know if that has anything to do with it.