Hi there I have a Audi A6 4F Avant with 2.4 V6 engine. It drives fine. But I noticed that in the morning when i start the car, I smell gasoline for a few seconds. I can't smell from the inside. What could this be? Or is it something I don't need to worry about?

And the worst problem is that with a cold engine, my car seems to vibrate a little bit. At first I thought it were the wheels. But when the engine isnt cold then the vibration is gone.

So could it be the coil pack? Or maybe someone will recognise this problem?