Climate Control Fix...
I too have this crappy servo unit that was already replaced once on my '81 380SL. The heater will not work reliably if at all, although the A/C works very well. I would really like to know about this ball-valve fix and how to do it on the SL. I live in San Diego but still it gets cold from time to time. Could I get some info on this? Thanks, -JK380