TWCompetitionS4

Last night, I backed out of my drive way and completely stop the car before I switched to drive (it's a Tip), the steering wheel shook and vibrated for 2 sec. is this normal? And then after driving my S4, I waited for couple minutes before shutting off my engine, and then I hear air coming out under the engine hood. It sounded like it's letting the air out, is this a normal sound?
Also, how loud will the air rush be when you tear the TBB? Is it a hissing sound?
Will you be able to tell the difference between the turbo and a torn TBB?

My car only has 280 miles and haven't drive hard with it.

Thanks for the response!

donp@audiworld.com

<p>donp - '00 S4 Silver/Silver
audizone.com