Thanks. Oh well... dad called me today at work and the package arrived, but there was only ONE o-ring in the package. I clicked on "1" quantity, assuming there were two o-rings in one package since one would normally replace them in a set and it showed TWO in the pic on the peachparts site here (see link above (kinda sneaky, lol), but there was only ONE in the package and we paid $14. shipping and to get another, its going to be another $16.50 (with shipping). (He said that there was also a hole in the package, so its possible the other had fallen out if two were in there originally). Oh well. Anyway he said he replaced the one and started the car and he said he didnt think it was the o-rings leaking, as gasoline was coming out of the holes on the eha valve. So... I am guessing its the actual EHA that is bad? He called one place to find a used one at a local MB shop and he said he could get one, but it would be at least $200.

Now... my next question how many other MBs interchange this part with others? I know where there is a 85 380SE in a junk yard... would it have the same EHA valve?