Air Condition/Heat Vents - Vacuum, etc - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 02-08-2012, 07:22 AM Thread Starter
BenzWorld Junior Member
Date registered: Sep 2011
Vehicle: 1974 Mercedes Benz 240D
Location: Texas
Posts: 9
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Air Condition/Heat Vents - Vacuum, etc

I'm trying to restore the AC and Heat functions on my 240D. I have good suction off the vacuum pump, the red and blue slide knobs seem to be working fine ( the hot water valve on firewall and louvers in the dash), the blower fan works, but I'm getting no hot air blowing out. I've located a couple of vacuum acuators or something under the dash, but I can't figure out how they're activated or what they do. Is there any diagram out on the internet to figure out the cooling/heating system on these cars. Also, do I need to pull the dash out to do this and how would I do it? HELP
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