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  #1  
Old 06-30-2001, 01:22 PM
robdog
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On the vacuum pipe between the brake servo and the vacuum pmp I have a small non return valve. There is a small brown pipe (3mm) leading from this to somewhere in the bowels of the car. Does anyone know what this does cos ive just broken it!!!!
Many thanks
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  #2  
Old 06-30-2001, 04:19 PM
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Join Date: Mar 2000
Location: Gainesville FL
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The original vacuum pipe was black with white plastic nipples that support various vacuum systems. Not knowing what body its hard to guess. Presuming you have a 123 body. The lines coming from the nipples are green: A/C, brown: shut-off function, yellow: door locks, black: early cruise control. Also black lines go to trans control on 80 and newer models.

If the line involved is the trans control the nipple has a very important oriface size and you should replace the vacuum pipe. The others can be variously fixed.
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Steve Brotherton
Continental Imports
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33 years MB technician
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  #3  
Old 06-30-2001, 07:57 PM
robdog
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Its an 88 300d 6 cylinder. 124 chassis.
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