So this is what happened. I was on a 4 hour drive in my 84 500sel with the AC on the entire time (low fanspeed and medium temp, so I wasn't pushing the climate control system too hard, it was just on the whole time) but somewhere along the way, the AC compressor no longer engaged. The next day, when I turned on the AC, the compressor still wouldn't engage, although the blower still worked. Then, figuring it was the AC relay, I jumped the connection at the relay in the fusebox, and the compressor came on but for only a second; and then all of the climate control system died. Now, the blower motor doesn't even work. I'm thinkin a fuse blew somewhere, but the fuse in the fusebox for the AC and blower motor is intact, so I'm stumped. Is there another fuseholder somewhere along the wiring for the AC and blower motor? And do you know what caused the AC compressor to no longer engage in the first place? What are all the possible problems here?