Hi Charles,you are probably right about doing it in the car,damn,but my time was spent removing the rad after I encountered two stripped out allen heads,and scraping an inch of dirt/oil off everything associated with aforementioned rad.I didn't want to introduce a bunch of dirt into my tranny lines.
My Haynes manual has two paragraphs on the vacuum pump so I've been relying on advice I found through searches,which sometimes isn't always right(model specific).I do need to get the MB cd but just haven't yet.I think the dealer kit may also include the roller bearing,I'll let you know.The dealer told me that diaphram is for a 115?model according to that part number.I'm the kind of guy that when it needs to be fixed,sometimes doing the'might as wells' is cheaper in the long run.I plan on seeing 500,000 km in this car and beyond so I believe(hope)it's worth shoveling money into.Thank you very much for your advice it's what makes this forum what it is