Hi this is my first post and after lurking on this forum for sometime....I finally was able to scratch my itch and bought a 80 300SD with 280K miles.

After changing out all the vacuum lines under the hood (including the 3 &4 ways) my tranny shifts better but I can't lock the car. When the car is running, all 4 door locks work (go up and down) as soon as I turn off the car I can't push any of the lock knobs down.

Although I haven't made it inside the cabin fixing any vacuum lines, could this be the cause of not being able to push the knobs down when the car is off?

Thanks

abears3,

Are you sure you got the tri connector on the vacuum valve correct. One lead has a restriction and that must be connected to the supply line.

If you didn't, you can ruin the transmission.

P E H

are you trying to push the door locks down with the door open.try pushing down with the door closed

Exactly......took me a while to figure out that very thing when I first got mine. A 1979 300SD with 112,000 miles.......a year later I have 118,XXX on it and loving it.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

damn those mercedes engineers.now i have to forgo the pleasure of locking my keys in the car.what were they thinking of?

German engineers in general
Had to have my girlfriend explain to me why the door lock wouldn't move when open. (She owns a BMW 325ic...same thing)
I don't feel stupid though, still know more about her gasser than her