Thread: 1983 300SD Mercedes Heater Weirdness
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Old 02-24-2015, 08:57 AM
SD Blue SD Blue is offline
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Join Date: Jun 2004
Location: West of Ft. Worth. TX
Posts: 4,186
That sounds more like air in the coolant system. With a cold system, and the nose of the car elevated on ramps, or similar, add coolant through the top radiator hose until it won't accept any more. Reconnect and run to bring the system back to operating temp and the temp control to high. (Keep the nose of the car elevated.)

CAUTION! Be careful disconnecting the upper hose as some have snapped the neck off while trying to free the hose from the radiator.
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Sam

84 300SD 350K+ miles ( Blue Belle )
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