I have been having problems with my AUX fan not working in both mine and my moms 300e's. I have narrowed it down to the resistors or whatever senses the temperature and tells the fan to turn on. I am attatchign a picture of the resitor from my car (looks pretty bad doesnt it?) and my moms is in similar condition although not cracked and corroded as much as mine. Is there a way to test a resistor without a multimeter? Also, I will probably ordernew resistors to see if that works because I did have mine work for a couple seconds after I bypassed the resistor and let it idle for about 15 minutes to build the heat up enough to trigger the fan so I know the fan works. I also tested the van with a 12 volt battery charger and both work which is nice that I dont have to spend $300 for each fan.

Any ideas on what is wrong? Resistor, turn on circuit? Something else? Any help would be appreciated.

Thanks.
brockley

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89 300E Pearl Grey Metallic
7 Spoke 16" staggered wheels (SLK)
215/55/16 Hankook Ventus HRII H405 tires
Euro Headlights
Smoked Corners
Smoked red/clear tail lights

1987 300e Black Metallic (mom's car)
8 hole 15" wheels (C Class)
Clear Corners
Red/Smoked tail lights