Mechanics

01

2001 Mercedes Benz S500 • V8 2WD Automatic • 127,000 miles

The heat works fine when sitting still. When I get up to 55 mph it turns cold.I have replaced the water pump, thermostat and heater control valve. The problem still exist. Please help I dont know what else to do.
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Big eric
January 26, 2011.




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