Just been to my local MB dealer to get a repair kit for the monovalve on my w126, as I only get warm air from the climate control, and not hot.
After they typed in the VIN into the computer, I was told that I have a dual monovalve because I have a heated windshield, and that there are no repair kits for the diaphram, and I would have to buy a whole new valve for $195.00!!
I never even knew that I had a heated windshield, or that they were even available.
Does anybody know and different or what I've been told is true??