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2010 Mercedes-Benz C300 4MATIC Question: blue smoke when starting dealer says valve stem seals



redmax, Glen Cove, NY, January 29, 2012, 12:36

dealer says valve stem seals

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  • Answer #1

    JP Motors LLC (28 Answers) , Woodbridge, CT - (203) 404-6025
    jpincharge February 12, 2012, 08:30

    Valve stem seals will cause this. Vehicle should still be under warranty, unless you have high mileage.

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