Alright, so I just removed the vac pump diaphram. There is a small tear in it about 1/4 inch long. The rubber has some cracks in it on the engine side as well that don't go all the way through. So, at least there is one problem. I will order a new diaphram today. However, I need the car to get around some before then. Soooo.... looking at this diaphram, I am wondering if I could clean it up and patch it with something until the new one arrives. hmmmm.....will report back when I've got something.

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'79 240D 4 speed manual 105k miles