What does the yellow coolant temperature light mean in a Mercedes-Benz C200?

[McMiguel]

Mercedes-Benz C200 yellow coolant temperature light indicates that the coolant temperature is too high. Coolant temperature gauge range: The coolant temperature gauge ranges from 0-130 degrees, with the normal temperature being 90 degrees at the center. When the temperature stabilizes at 90 degrees, it indicates that the engine has reached its optimal working temperature. Overheating: When the car's coolant temperature is too high, the driver should stop the vehicle and wait for the temperature to drop to normal before continuing to drive. Reading the temperature gauge: The 'C' on the car's temperature gauge represents 60 degrees, while the 'H' red mark indicates 110 degrees. The span from 60 to 110 degrees helps estimate the approximate temperature shown on the gauge.