We've had the car for over six months, Audi Q5 2011, used with 15,000 miles, and a smell of the fluids is coming through the AC vents and becomes more acute when the air is cool. I took it to the dealer and this young tech did not find anything wrong with the AC. I smell it even when I am close to the car early in the morning. They told me that sometimes the oil caps are left dirty and the smell comes through. I cannot tel if it is a transmition, brakes fluid or other smell, but the smell is there. Has anyone ever had this problem? Ever since I bought it I thought it smelled funny, but I though it was the leather.Can something as easy as putting is recycle air solve this problem? I shouldn't have to do this to avoid the smell. Thank you.