If you keep at it, you should be able to find a euro / w140 manifold for much less than that...unless the person selling it knows that there is demand for it. I originally got mine for $75 and stupidly sold it years ago for more than that. Check some of the online junkyard sites, sometimes they have one.

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Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k