Like I said before, I have not once heard or seen the AUX fan operate so I think that is my problem. All hoses look fine and all belts were tightened or changed roughly 6 months ago durign a major service by an MB tech. Ill try to figure out why the fan isnt working.

I know it is supposed to turn on at a certain temp but what controls that function? Could it be that the fan is fine but isnt being told to turn on? What should I check to make sure the fan is functioning properly?

Thanks.

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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