just watched your video on the front ac fan on the E39.
when i start the car frim cold and switch on the ac, the fan does not start rotating until after about 2 mins. The car has never overheated, but is this normal function?
To see this working, head to your live site.
Search
Mine does the exact same thing. No overheating.
The front fan comes on with A/C at a certain temp. It's electrically operated.