Quote:
Originally Posted by benzme
The German guys that look after my car when I can't, have 40 years experience as Mercedes techs. They told me the hash mark above 80 is 90c.
I posted this and Arthur Dalton kindly corrected this misunderstanding. I now have no reason to believe MB would go to the trouble of recalibrating the entire temperature sensing regime for the (small) Ozzie market.
When the gauge in my TE indicates half way between 80 and the next hash mark, the thermostat is fully open and the temp is about 87. That is where about it stays in all conditions.
I believe Mr Dalton. I hope he does not mind me quoting his PM.
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Quote:
Temp indicator hash markings on ECT gauge are in 20 Degree C increments.
60/80/100/120 -Centrigrade
The 100C mark is Factory Test Indicator mark used in testing preocedure of both gauge and sensor for specification accuracy.
The sensor/gauge test procedure is to sub. a 38 ohm resistance in place of the sensor. The gauge will then align with the 100C indicator marking.
A Dalton
BenzTechs
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A Dalton
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I used two 82ohms in parallel, the resultant resistance is 41ohms. As you can see in the pic, it's almost right on 100°C. Thumbsup to A Dalton!
I decided to take a pic of my two temp/fan switch setup as well. The switch closest to the thermo housing is the NEW 91/99 switch & the original 100/110 switch is next to the new switch.