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#1
03-30-2000, 10:50 PM
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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
03-30-2000, 11:07 PM
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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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