Heater is set on high, heat do not get hot anymore(Warm air) on 1999 Mercedes-Benz CLK430

When slowing down or at a stop,it blows cool air.

by in Upper Marlboro, MD on January 24, 2014
4 answers
ANSWER by on January 24, 2014
Check coolant level, is temp at running temp aprox 180 - 200deg. Water pump would be last option.
ANSWER by on January 24, 2014
poss thermostat or coolant level
ANSWER by on January 24, 2014
When engine is cold, and if you have a expansion tank system, check water at radiator cap. My guess is low coolant too. Could be if you have a bad cap or something is loose on line to expansion tank, coolant will not return to radiator. Also look for a small leak if radiator level is down.
ANSWER by on March 16, 2015
Blower resister no ebay no Chinese it's under glove compartment change fitter half hour work. Part $125 to 250