yeah, thanks for that tip BWitmore. so I tested it with door closed and locked and it seems to hold vac. I know i have to test other doors/trunk, etc. - but I was hoping I may have found something wrong on the first door i tried! no such luck it seems.

so - where is this check valve in the main solid yellow line supposed to be? in the door, under the dash? I have the yellow valve in the engine compartment that goes into the firewall (splits to tank and driver door) - but I didn't see any other check valve on the line in the door itself. i can't be sure, but it didn't look like anybody had been in this door before... but if i had no check valve, then the system would likely not hold up after I shut the engine off. All 5 locks work great when system is running, lose charge after about 10 or 15 seconds after shutoff.

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Andrew
Montclair, NJ
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1982 300D Turbo
120k
Petrol Blue Green