Thread: Coolant flush!!
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  #7  
Old 07-29-1999, 10:57 PM
metricman
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The official mercedes-benz coolant replacement interval is every three years.
Beyond that poimt the additives in the coolant have begun to lose too much of their effectiveness.
The actual antifreeze does not wear out.
The 50/50 mix is good to -20F.

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