E-Class (W212) 2010 - 2016: E 350, E 550

Wiring for fan?

Old 09-10-2017, 06:10 PM
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'76 Triumph TR6, '14 W212 Sport, '09 Audi S5 4.2
Wiring for fan?

So I replaced the fan in my '14 W212 because a jack mishap damaged the shroud. Not good enough for the Mercedes, but it's still good enough to transplant into my TR6. So, I replaced the fan but have a usable spare, with some JB Weld. I really want to use this one because it's so QUIET. Aftermarket stuff, and even other junkyard fans I've used, sound like Cessnas.

I have four wires going into the fan controller attached to the shroud - two thick and two thin. I can probably get away with just taking the controller out entirely and just wiring the two leads from the fan motor to a thermostatic switch and calling it good. However, I'm wondering if that's a resistor pack on the fan shroud there, and the two thin wires are maybe triggers for high and low speed? Or what? Anyone know what the wiring diagram for a W212 fan looks like?

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Old 09-11-2017, 12:50 PM
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2014 E550 4Matic Designo Diamond White and loaded up
My fan on the W211 and W212 don't sound like a Cessna; they sound like a damn F-16 when at high speed. Are you sure about this QUIET thing?
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