Maybe you should have checked before buying?! Common e39 problem, you did do some reading first... surely?
Turn the air conditioning on while stationary, the pusher fan (electric fan at the front of the engine bay) should spring into life after a few seconds. New fan is a few hundred quid - stops the aircon system overheating.
Turn the air conditioning on while stationary, the pusher fan (electric fan at the front of the engine bay) should spring into life after a few seconds. New fan is a few hundred quid - stops the aircon system overheating.


