87 560SL AC unit works great when working! Air is freezing cold and still using freon 12! Only trouble is it only wants to work when I first start the engine. Will work fine until I shut the engine off, then refuses to start. Blower won't run, compressor will not start, nada, nothing! Next morning, go out and start the car, working like a charm again. Must be a sensor somewhere but cannot find anyone who has experienced a similar problem. Is it the in car temp sensor, the ETR, temp sensor for heat exchanger? Seems that when it gets warm or too warm, something somewhere, when you need it most, is functioning exactly opposite to what it's supposed to? Any help or suggestions much appreciated.