With all the lines plugged, excluding the brake booster, what is your vacuum reading with the engine running?

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

That is an excellent assignment. I’ll have to wait till I get back home for that, in a few days.

I did check about six months ago and best I can tell the vacuum pump is working properly. Also the brake booster itself seemed to be sound. But I need to look at everything again. I have a guide from Kent about troubleshooting vacuum, I’ll refer to that, and come back here with questions.

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Te futueo et caballum tuum

1986 300SDL, 362K
1984 300D, 138K