Auxilary Fan Switch Modification M104
 

Hi

Is there any resources for a W124 M103 mod? I see this for other years and do not see any clear information for this car.... I live in hot Southern CA. I have exhausted all other means to cooling the car - 2 flushes, thermostat, new fan and clutch, etc etc etc... just need to know what part to cut open and solder a 700 ohm sensor into.

Thank you

james

PS the car is a 93 300CE

It sounds as though you may have overlooked something within the cooling system. Your car should not overheat just due to your warm climate. If the water pump and radiator are original, they could very well be suspect in your high operating temperatures.

James,
I have the same car. I had Jim Forgione supply me with a resistor device that clips right on to the temp sender. He has various models but I wanted something to turn on at 88C. It turns off at 83C. While my aux fans are on frequently my temp has never risen above 90C except on a trip to Parker last year. The air temp was 115F and I was driving at 80 mph. The car temp ran about 105C.
Something else I noticed is that a radiator out of my '95 E420 is a lot larger than our 300CE radiators and will fit in the same cut out. My E420 barely gets to 80C even in the hottest conditions.
Email me if you want to see my resistor installation.
Anziani