Sounds right... I called mercedes.. No diaphragm for the ip or the vacuum pump! Augh! omg! I figured on doing both... When I disconnected the line from the ip it smokes like crazy! And ideas on where to get a diaphragm from?

I might be able to help.

Post up the serial numbers of the pump.

I need the numbers on the plates - they will look a bit this this I guess (though this is a later pump)

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!