Exhaust leak ??
 

Ok so I bought an A4 today and i drive about 6-7 miles away from the dealership and I hear this LOUD sound coming from my exhaust like as if I bought a honda from a 16 year old. So im still driving home and now my check engine light is on, the inside of my car smells like exhaust and I dont really know what to do lol, Im going to autozone tomorrow to get the codes
Thanks for any help,
Nick