E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Aux fan controller and overheating protection

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Old 02-18-2017, 06:07 PM
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Aux fan controller and overheating protection

Hey everyone,

Over the years I've owned many M103 powered cars and some ran warm in the summer and a few even overheated.

So I've created a module to help manage temperature and most importantly give a heads up if things get toasty. It's worked well in my car and proved useful at keeping engine temperatures low.

I'd like to offer it to you guys as well.

The installation video is a bit short and scruffy, pardon my lack of video editing skills. Once adjusted, it shows that the aux fan turns on, and then later, if it's overheating, the coolant light starts flashing and it beeps a few times.

Let me know if you have any questions!

Grotto - Engine Temperature Management

Last edited by ptoro01; 02-18-2017 at 08:09 PM.

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