The CCU in my car does not have a fuse. I just replaced it this past summer and the aux water pump so I know those are good. Some of the long time MB wrenches on the MB mailing list seem to think it is likely a blend flap problem. Will have to check the monovalve that controls that when I get the time to take the dash out. Unless somebody knows a way to check that one with out doing that?????

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89 190E
2.6L
Arctic white
Grey leather
Sunroof
Pirelli P400 rubber
Smoked corners