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curtis Lewis
curtis ... 10/4/2010
1991 Mercedes Benz 560SEL Base 8 Cyl 5.6L - Engine
heater blow cool air no heat
1 Answer
  • vince^_^
    vince^_^ 10/8/2010
    Check your engine coolant level and if it’s low refill it and bleed air in you cooling system, check your engine coolant operating temperature (if your coolant temperature is below specification check the condition of your thermostat it may be defective of stuck) and the operation of your heater control valve operation.
    Marcus 1/3/2011
    thanks for the info. I was thinking along that line. where's the thermostat on this model?

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