MB (123) 200 - AUX fan problem

HI!
Just wanna get some opinions...the AUX fan in my car that's infront of the radiator, that is nearer to the grill of the bonnet, has recently refused to come on even when the temp gauge is over 120.
There is only one connection-point for the fan and I've taken the entire
fan out to have a look...it looks simple enough.
But I can't figure out what is wrong.
THe power cable looks fine.
Is it possible the fan has actually bought it?? The car is some 14 yearsold....
Any other "not so simple" problem that's possible???

Thanks a whole lot.
THe weather in Singapore is a scorching 34 degrees Celsius at least everyday...the fan is really an essential item here.