300E Auxiliary fan always on

[fiberbundle]

I have a 1988 300E that developed the problem of having the Auxiliary fan staying on after the car is shut off. This went on for over 2 hours until I decided to remove the fuse to shut it off. Any ideas on what caused this intitial problem?
It also developed a secondary problem when I went to start it the following day. It starts but shuts off within 5 seconds after releasing the starter with the ignition key. It will start this way again time after time with no delay so my assumption is that is not a fuel pump issue unless there is a secondary circuit that initiates after the start cycle.
Any help would be greatly appreciated.