Started smelling a faint gas smell in garage at first then got stronger moving to the cabin. This was over a two week period or so.
Brought it in to MB and it was a bad EHA valve that had started to drip drops of gasoline when made there way into the cabin. They are expensive but the shop had several fuel assemblys laying around. They had to try a few before they found a good one. They didn't charge me for that, only the other work they had done.
Guess it was a good business move on his part (owner of Shop) as he did tell me they were in the neighborhood of 200.00 to replace.
It did stop the gasoline smell and has been fine every since.
My bet is on the EHA valve as others have stated.
1989 420SEL 105575 miles
1990 Chevrolet E-Cab C-1500
1989 Olds Toranado Trofeo'