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Old 09-05-2007, 11:32 AM
gmercoleza gmercoleza is offline
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Join Date: Sep 2004
Location: DFW / Collin County Texas
Posts: 1,882
On the '91 W124, the defrost pod is probably torn and/or leaking. The default position is defrost ON, and engine vacuum pulls it to closed position (OFF), but it can't/won't be pulled if it is leaking. I have never replaced one on a W124, but on my W126 it is readily accessible and removable if you take out the glove box liner (I just did this the other day). You can rig the defrost flap closed until your new defrost pod arrives (that's what I did). I imagine all of this is probably similar for the W124.

On the '97 W210, brewtoo is correct. Check the charge first. If the charge checks out OK, check the mono- or duo-valve.
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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280
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