forgot to mention, with my car only the aux fan was becing activated at like 115F above, it would cause the temperature to swing up and down, since I have replace that stuff, the temperature is almost dead steady, even with the ac on at a stop light for a bit.
2000 C230 Kompressor
1988 190e 2.3 - 225K miles, owned for 7 years. I cannot say enough good things about this car. Very well built, even at 225 it ran like new.