Mercedes-Benz Forum - View Single Post - Aux fan and clutch fan
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post #5 of (permalink) Old 05-21-2013, 04:04 PM
holmesuser01
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Date registered: Jul 2009
Vehicle: 1984 190E 2.3 engine Automatic, 2002 C240 2.6 Automatic
Location: Asheville NC USA
Posts: 240
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My '84 has a sensor switch on the water pump cover that activates the electric fan.

There is another one up near the oil fill hole that controls the fan clutch. When I got it, my car was wired to run the clutch fan all the time, and it got really loud on the highway.

On my car, the sensor to the right with the red color on it controls the fan clutch. The newer versions of our cars are similar, but the temperature switch might be different.
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