Hi folks! I recently inherited a 1985 500SL. The cooling fan is not running, resulting in numerous problems, including the engine overheating, loss of power, and no air conditioning. I've tested the fan by connecting directly to the battery with jumper cables and the fan works just fine. This leads me to believe it is the relay. I found the location of the relays above the fuse panel, but I don't know how to determine which relay it is. Also, when I find it, what is the best method for testing continuity? I appreciate anyone's advice, and I hope I can be of some help to someone in the future on this board!