I suspect that the MB product is the typical citric acid crystal product commonly used in industry as a mild acid flush or stablized chlorine dioxide activator. Maybe Hazen can tell us if there is a chemical analysis panel on the bottle?

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Steve

1992 300CE Sportline Sophie
1990 300E Emma - in the family
1979 240D Josephine - sold, but not forgotten
2004 Pacifica AWD

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