Hi all, I was wondering if anyone could help me diagnose my radiator fan problem on my 2000 s500. The fan will not turn on no matter how hot the engine gets. I pulled the fan motor out and applied 12 volts to it directly and the motor runs fine. Is there a sensor on the engine that needs replacement and if so where would it be located. Where would the fuse for the radiator fan be located so I could check that. Any help would be appreciated. Thanks, Adam.