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Old 08-05-2008, 03:10 PM
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Join Date: Oct 2006
Location: North Carolina
Posts: 80
Question 85 300SD and Climate Control

Effective yesterday, with the AC on and the climate control downward flow button pressed - I am getting very little center air flow yet my windshield is getting a lot which is causing exterior condensation.

Since yesterday I have begun to feel a cold drip of water on my feet as the driver of this vehicle, with the AC on.

For a long time now, my rear compartment center outlet - within the center console yet for the rear compartment - puts out cold air no matter what the temperature I set the climate control for.

Any guidance would be appreciated.

Dave H...

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Old 08-05-2008, 03:25 PM
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Join Date: Jul 2007
Location: USA
Posts: 2,156
you may have a leak in your ac lines or your evaporator is shot
1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)
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Old 08-05-2008, 03:45 PM
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Join Date: May 2008
Location: southern CA
Posts: 408
Originally Posted by a52daveh View Post
I am getting very little center air flow yet my windshield is getting a lot which is causing exterior condensation.
Check vacuum leaks in system - green vacuum line on engine side of firewall to start. If you find it won't hold, check each pod from behind ACC to isolate leak. Sounds like center and defrost at least. After mining expedition to remove bad elements rebuild with new diaphragms (search replacement diaphragms here). Water is most likely decade drain line. Can be fixed with plastic water bottle. Search AC drain. Searching A/C trouble shooting will yield much more detailed info. Good luck

1972 280SE 4.5
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