Thanks for the reply Mark. I'm not quite sure if my car has one, but I was thinking that the fuel pressure regulator is the same thing. Hopefully one of the mechanics will stumble upon this post and give us a definitive answer. Thanks again.
EDIT: I just found that FastLane has the fuel accumulator (http://catalog.eautopartscatalog.com/mercedesshop/quote.jsp?partner=mercedesshop&year=1987&product=E4000-33285&application=000465844
) I wonder if this is the same thing as the fuel pressure regulator?