Well the ol benz decided to try and give me a fit yesterday. The vacuum system has been getting a little week and leaking down lately. Yesterday was becoming pretty bad when it wouldn't lock or unlock doors and at the end of the day it wouldn't shut off. Oh yeah the brake pad sensors worked great, that light came on too. Almost had to look at the owner's manual to figure that one out.

I thought at first it was going to be door lock slave so I was ready to take off all the door panels and start poking around. But I thought I'd go back to square one at the vacuum source. applied vacuum to the system locked and unlocked all the doors with the ignition off. All looks good. Now with the ignition on. Thought it weird that I'd have to build up more vacuum with the vacuum pump but away I go and hand pump the vacuum up again. Test the doors again all good. so I shut off the ignition again. And again no more vacuum. Ok use the hand pump again build it up (10" or so vacuum). Turn on the ignition again (not starting it) and again no more vacuum. In the on position it looses all vacuum and does vacuum down very well. So I'm thinking the switch it self

Oh yeah that fitting on the brake vacuum check valve at 34 years old is pretty delicate. I'm sure of it as I just broke two of them tonight

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1984 280SEL, 62,000 miles
Euro model in the USA
1983 300D (Totaled out 10/2004)
New Factory Mint Green paint
Palomino int
1982 240D (Steak dinner for two)