1978 450 SLC Vacuum locks - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 06-02-2011, 04:09 AM Thread Starter
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Date registered: Jun 2011
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1978 450 SLC Vacuum locks

Hello there,

Just bought a 78 450 SLC, 80000KM, apparently never winter driven. The issue I am having is that when you lock the door on the driver's side, the vacuum lock fails to engage and lock the rest of the car. As well the lock that keeps the seats from coming forward does not work either. Strangely enough, the A/C seems to work. Any advice on where to start would be much appreciated.
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post #2 of 2 (permalink) Old 06-04-2011, 09:11 AM
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Date registered: Sep 2008
Vehicle: 1975 450SL
Location: Phoenix
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There is probably a vacuum line or fitting broken. There is a main valve/actuator in the driver's door that controls a lot of the locking behavior. There are also some hard plastic lines that tend to become brittle with age. The ones on my 107 going into the doors have broken, but that's sort of down the list behind a bunch of other stuff that needs to be done.

You may want to go to the 107 forum, and look at the EGv107 sticky there. A lot of seriously dedicated nutcases (myself included, especially the nutcase part) hang out there and are willing to help.

Remember: It's not just a car. It's an Adventure.
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