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Old 06-19-2001, 09:21 PM
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engatwork engatwork is offline
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Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,773
this may get you started

Bob. On my '85 300D I have gone through some of the actuators with the mighty vac. The following actuators work: center vent, defrost main and recirc. I have not tried the foot area actuator but need to. I ended up replacing the recirc actuator. Funny thing about the recirc actuator - after replacement it works but if you put the tester on it it "bleeds" off the negative pressure. It is brand new so I guess it is designed like that. Keep me posted on your troubleshooting and I will do the same. I did find the linkage disconnected on the center vents. Also, get a copy of the "Electrical Troubleshooting Manual" from the MB 800 number for this car. It has all the schematics for the vacuum system too.
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