i intend to do the same but noticed that the fan kicks in with the AC switched on. irrespective of temperature .
mak
300se

No, its for M103 and M104 as well.

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I never go far without a little Big Star

1994 E500 199/Gray 82k
84 300D (Salty) Orient Red/Palomino 141k
88 300CE (Ersatzhammer) 904/Java 163k -- Turbo Technics twin turbo kit, AMG Gen I body kit, Sportline steering box and steering wheel, Sportline/Eibach /Bilstein Sport/500E suspension, Quaife LSD in 210 mm diff case, Silver Arrow brakes.
88 300CE Brabus 3.6 199 on Black 44k

What about the M111 engine?

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Smoke Silver 1994 E220 Coupe Automatic
0 kilometers 6 September 1994
100,635 kilometers - 6 September 2010

If the M111 is anything like the M102, M103, M104 or M119, find the blue 2 prong temperature sensor on the cylinder head and add a resistor parallel to the sensor. On my M103 I used a 860ohm resistor to bring the trigger temp down from 105c down to 90c. On the M119 they added a 1.1k ohm to bring the trigger temp down from 100c to 92c. Its a really simple modification that should work on all of the early 90s motors.
http://pages.prodigy.net/jforgione/MB_CTS.html

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CENSORED due to not family friendly words

Is it meant to be in the cylinder head or the thermostat housing?
I'll have a look under the hood tomorrow

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Smoke Silver 1994 E220 Coupe Automatic
0 kilometers 6 September 1994
100,635 kilometers - 6 September 2010

I didn't find anything...
Even the thermostat housing has no sensors on it...
Where can it be?

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Smoke Silver 1994 E220 Coupe Automatic
0 kilometers 6 September 1994
100,635 kilometers - 6 September 2010