What does this vacuum pump fit? (PHOTO)

What years and models of Mercedes used this Pierburg pump? It came off my '78 Peugeot 504 and I need the repair kits for it. When I looked up a 240D it listed 2 different diaphragm and valve kits that looked like they would fit. I haven't cleaned mine up but do the pumps have some ID numbers with which to order the correct kits? I know if I go into a parts store and say Peugeot they won't even bother to look it up.