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  #1  
Old 02-20-2003, 08:57 PM
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Location: MINNEAPOLIS, MN
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Power locks driving me crazy!!!

Last week I purchased a nice 1985 300TD Wagon (W123) and the power locks worked fine. I removed the battery from the car and when I locked it all the locks went down (without the battery being in the car!!!). They also went up when I unlocked the car without the battery being connected. When I connected the battery the locks don't move anymore. I can lock each door separately but the power locks are out. All the fuses are good.
I am so confused.

Igor Zeljic, Minneapolis.
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1984 MB 300D Turbo Diesel W123 Sedan 132K
1987 MB 300D Turbo W124 Sedan 295K
1983 Porsche 944 104K
1989 Audi 80 Quattro 180K
2002 Audi A6 3.0 Quattro Avant 49K (Wife's car with warranty )

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  #2  
Old 02-20-2003, 09:04 PM
sixto's Avatar
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The central locking on that car runs on vacuum, not electricity.

If you haven't started the car for a while, you might have used up the vacuum, so to speak, in the reservoir.

Sixto
91 300SE
87 300SDL
83 300SD
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  #3  
Old 02-20-2003, 09:14 PM
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How do I get it back??

Is it recoverable? I believe that the vacum is causing my other problem too. The car is extremely difficult to start and once it's running you can take the key out and it still runs so I have to press the stop button on the engine in order to shut it off. My mechanic told me that I might have the vacuum leak somewhere. What do you think?
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1984 MB 300D Turbo Diesel W123 Sedan 132K
1987 MB 300D Turbo W124 Sedan 295K
1983 Porsche 944 104K
1989 Audi 80 Quattro 180K
2002 Audi A6 3.0 Quattro Avant 49K (Wife's car with warranty )

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  #4  
Old 02-20-2003, 09:27 PM
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Join Date: Oct 2002
Location: Colorado Springs
Posts: 481
thats exactly the problem a vacuum leak, also as diesels do not generate vacuum you might want to check your vacuum pump.
m
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  #5  
Old 02-20-2003, 09:27 PM
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Yes you have a vacuum leak. Start the car and drive it. Everything will generally return to normal .... but you will still have a vacuum leak to find and solve.

Haasman
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  #6  
Old 02-20-2003, 09:29 PM
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Location: MINNEAPOLIS, MN
Posts: 140
It must be vacum.

On another forum a member sugested that I might have a vacum leak at one of the doors and since the systems are conected he thought that it's the same problem causing my headachee. Does anyone know where the vacum hoses for the door locks are so that I could check them.
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1984 MB 300D Turbo Diesel W123 Sedan 132K
1987 MB 300D Turbo W124 Sedan 295K
1983 Porsche 944 104K
1989 Audi 80 Quattro 180K
2002 Audi A6 3.0 Quattro Avant 49K (Wife's car with warranty )

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  #7  
Old 02-20-2003, 11:32 PM
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Join Date: Apr 2001
Location: Beech Island, S.C.
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Door locks not working

Is it possible that you inadvertantly knocked a vacuum line loose? Check the vacuum lines around the oil filter area and likely one of them pulled out. It's very easy to do without knowing you did it.
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  #8  
Old 02-20-2003, 11:49 PM
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Start the car and drive it. Everything will generally return to normal .... but you will still have a vacuum leak to find and solve.

Do you think that my shut-off problem will return to normal as well just by driving the car and brining the "vacuum level" back to normal. If I understand you guys correctly when my locks start working I'll be able to shut the car off normally with the key and not by pressing the STOP button on the engine?
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1984 MB 300D Turbo Diesel W123 Sedan 132K
1987 MB 300D Turbo W124 Sedan 295K
1983 Porsche 944 104K
1989 Audi 80 Quattro 180K
2002 Audi A6 3.0 Quattro Avant 49K (Wife's car with warranty )

http://banners.wunderground.com/bann...inneapolis.gif
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  #9  
Old 02-21-2003, 02:37 AM
MikeTangas's Avatar
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Look closely at the area of the battery. In the removal/replacement it is likely you knocked a vacuum line off or broke a plastic nipple. This will give you a vacuum leak which would be the source of your lock/unlock problems, probably the shut down problem too.
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