vacuum system bill of materials - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 06-18-2010, 11:26 AM Thread Starter
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Date registered: Jun 2010
Vehicle: 1978 300D
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vacuum system bill of materials

I'm happy to discover that I'm not the only one that has struggled with the vacuum system. At the same time, with the age of the car, I am inclined to replace the entire system - all of the lines, rubber connectors, etc. Has anyone figured out what the bill of materials are for this system? I.E. How many of each connector, how many feet of each color line, etc. For at least the interior of the car. This way I can replace everything on the inside an be confident that if I have any remaining leaks, it will be in the engine compartment.
Thank you in advance
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post #2 of 3 (permalink) Old 06-18-2010, 12:28 PM
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haha, im not gonna say its impossible, but its damn near.

Your leaks are probably at the door lock vacuum actuators, or a crack in the lines where they go through the door. Check the master vacuum switch in the drivers side door, check the yellow check valves under the hood. Check the vacuum tank reservoir seal for leaks.

'79 280CE with 226,000 miles
'76 240D 4 speed with 190,000
'85 300D Turbo with 266,000 miles


GONE but not forgotten
'76 300D with 195,300 miles
"83 300D with 174,000 miles

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post #3 of 3 (permalink) Old 06-18-2010, 03:26 PM Thread Starter
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I have simply found too many cracks and replaced to many lines. I'm tired of the "fix one piece at a time" scenario to only find another failed connector. I realize these pieces have long served their purpose and I would rather just replace everything so I can be confident that I won't be back searching under the carpet to find another leak.
At the same time, I don't want to go back and forth to the dealership, asking for another piece that I forgot. With a BOM (bill of materials), I can just get everything and then spend the weekend replacing all of the components.
Thanks for the advice on the master vacuum switch. Had I discovered this site earlier, that would have saved me a great deal of work.
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