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1999 Mercedes-Benz C280 Question: squealing noise when start engine? What causes that.

 

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Visitor, Hanover, MA, February 01, 2011, 07:11

When. we start out mercedes the engine makes a loud squealing noise that may continue when we drive it for a period of time. We have replaced the anternator, belt and idler pump

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  • Answer #1

    Visitor, February 01, 2011, 10:11

    most likely the serpentine belt is slipping because the
    belt tensioner is failing

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  • Answer #2

    motorcarsinternational from Motor Cars International, Inc., February 28, 2011, 11:48
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     Technician

    may be and over chargibng or over worked alternator,have the battery tested and charging system checked at a benz shop,also make sure the belt and tensioner were replaced with german quality parts not the cheap aftermarket chinees parts

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