Lee, count yourself lucky that you're in a place where rust-free w124 wagons live on. Up here in Toronto .. not so much. And they're all 4matics *shudder*.

I have a mityvac, but I don't really know what I'm doing with it. The next thing on my repair agenda is likely the hoses to the ICV, these seem to be a common weak spot on our old m103s and it's a cheap 'fix'.

O2 sensor was replaced about a year ago, mentioned in the OP.

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1992 190e 2.6