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Discussion Starter #1
Before i go chasing a monster that might not even exhist, can someone tell me if a 1982 300CD should have vaccum actuated door/trunk locks, or do you have to lock each door/trunk individually on this model? On my '83 300SD if i locked the drivers door all the doors/trunk locked, should it be like that on an '82 300CD?

Thanks,
Doc
 

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1979 280CE
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6,118 Posts
Yes, you car should have vacuum operated locks. When you lock the drivers side door the passenger side door, fuel door, and trunk, should all lock.
 

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1982 300CD
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5,157 Posts
In the driver's door, you'll find a switch with 3 vacuum lines plugged into it.

The plain yellow line comes in from under the hood.
The yellow line with the red stripe locks the rest of the actuators, while the yellow line with the green stripe unlocks the rest of the actuators.

You need to get yourself a MityVac to test the actuators and make sure the lines and connections are good.
 

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81 mercedes-benz 240D 400k (in portugal),97 Mercedes-Benz E36 Amg (dad's car)
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330 Posts
mine sometimes don't open all together. i think they ussually close after the car was runing. could that be the same problem?
 
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