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#1
10-18-2009, 04:49 PM
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which lines to block for shut off
My computer is doing weird things... can't sue certain parts of g-mail, and when I click 'search' I only get teh top corner of the box... so in the meantime I want to be able to shut off my car. Which are lines going to the doors? Maybe that will help isolate the problem, although my brakes feel weak, so I'd assume the leak was before the booster.
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1981 300D 205,000 mi. 
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#2
10-18-2009, 04:57 PM
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If your brakes are weak you either have a big leak in the main vacuum line going to the booster or a bad vacuum pump. Plugging the yellow line under the hood will cut out all the door locking components.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#3
10-19-2009, 06:22 AM
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Sounds like a bad vac. pump. Disconnect the 19mm vacuum fitting at the brake booster and with the car running plug the hole with your thumb. You should fool a moderate/strong suction. Do this with all lines disconnected from the main vac pipe and all the nipples plugged. A vacuum gauge is also a good thing to buy if you own a w123.
The yellow lines with stripes are the door element lines. Green striped line is your climate control which leaks just as often as doors.
__________________
 1981 300SD 512k OM603
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