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  #1  
Old 11-18-2002, 03:47 PM
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Location: moses lake, washington
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locks

my door locks work fine as long as i lock or unlock no more than 5 minutes from the time i turn car off. i know it's a vacuum leak. is there a place to start looking or a common problem area. 1983 300d turbo.
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Old 11-18-2002, 06:12 PM
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With 20 year old rubber diaphrams in 3 doors, gas flap & trunk I would either block off one door at a time OR just replace all 5 diaphrams. OF course make sure that the vacuum check valve under hood will hold vacuum first.
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Old 11-18-2002, 06:32 PM
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Cool

where would i find the gas flap, diaphrams and this valve? i am a fair mechanic but new to m.b. cars much less a diesel. thank-you for your help.
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Old 11-18-2002, 07:06 PM
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Gas flap: passenger side behind the trunk hinge. Pull out the plastic trunk liner and you can't miss it.

Under the hood: Hook up a hand vaccum pump to the yellow (those are door lock) lines, check to see if they hold vacuum.

Doors: Inside at the bottom (held in with two 8mm bolts) is the locking element. Driver's side is different, it just has a valve. Check all rubber fittings for cracks.
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