I have searched the webstore of the sponsor of this forum and other known Mercedes parts websites for a new brake booster vacuum line for my 1986 300SDL, The little white/black plastic valve in the line (which also provides vacuum to the engine shutoff) is broken. I have been told that you cannot buy the plastic part alone; you must buy the entire line.

Is this true? If I can buy just the plastic valve, where are they available? I see that there are people producing the entire line new for sale on a very popular auction site, so there must be a source for the parts. Any help would be appreciated.

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Mike Frederick
1986 300SDL, 240K+ miles
1985 300D KaliKar, 270K+ miles