I have a 1990 190E. I've pretty much pinned the gasoline odor down to situations when I've driven the car for a while and parked it (for example, while shopping)and when I return to the car it smells of gasoline. Same deal when I return home and park it in the garage. Keep in mind the odor is not overpowering, but it is definately there. A few months ago I had the fuel pump seals replaced and my mechanic has been over the car stem to stern and found nothing since. By the way, the smell seems to come from under the hood. Any thoughts?