The aux fan (aircondition) keeps running even after I pulled the ignition key out on my 85 380sel. I only realised after trying to start the car and the battery was flat.
I had to replaced the battery but the fan immediately start to run again when I connected the battery cable.
I had to disconnect the wire to the aux fan to make it stop.
Now I can't use the aircon because the car might overheat without the aux fan connected.