I have a 1993 325is. Lately, I've noticed that after I fillup the tank, I get a very concentrated smell of gas fumes. This smell continues until the tank gets below 3/4 of a tank. Then the smell disappears. It is bothersome because I have an attached garage and the smell overwhelms the house. I've checked for leaks both around the gas tank and the engine...don't see anything.

Has anyone experienced something similar or have any suggestions on what I can do short of bringing it in for a mechanic to look at?

Thanks

D. Mahon