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Old 01-25-2004, 11:32 AM
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benzfan benzfan is offline
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Join Date: May 2001
Location: Toronto
Posts: 277
The pump they refer to has no bearing on the heater function. It will continue to circulate warm coolant after the car has shut down, but only if you tell it to. Mine hasn't worked in years, but it doesn't affect the heater. You really need to see a dealer to diagnose this accurately without spending extra money. Search this forum for a thread regarding c280 A/C woes and you will gain some insight into the self-diagnostic functions which might help you pinpoint bad sensors, if any.
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