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Old 08-09-2003, 12:58 PM
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Mercedes sell an alkaline cleaning compound (p/n 001 986 21 71) that should be used to flush oil from the cooling system. I think a 3% solution is recommended running the engine for at least 10 minutes with the heater on before flushing with clear water.

My dealer did this several times for half an hour when they did mine.
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