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  #1  
Old 03-30-2000, 10:50 PM
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Join Date: May 1999
Location: Charlotte, NC, USA
Posts: 688
Curious to know if anyone can tell me what the black vacuum line that is behind my instrument cluster is for. This is on a 1984 2.2Ldiesel chassis, now converted to gas. The drivetrain is out and the speedo being upgraded to digital and I found a vacuum line, but there is no economy gauge. If you blow into it it comes out at the P/B booster
so its in the vacuum system. Why? All chassis from factory equipped but some not used?
Thanks for the insight.

TobiasMB
300SE, 300CE, 190/5.0
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  #2  
Old 03-30-2000, 11:07 PM
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Join Date: Mar 2000
Location: Gainesville FL
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The diesel used a vacuum proportioning valve for trans control. The vacuum was vented through a black line into the dash area. it did this so it wouldn't pull moisture or other trash in from under the hood.

It wasn't hooked to anything.

------------------
Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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  #3  
Old 03-31-2000, 11:45 PM
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Join Date: May 1999
Location: Charlotte, NC, USA
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Steve,
Thanks to the insight relating to the black vacuum line behind the instruments....it makes sense.
Tobias MB
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