Question about Mercedes-Benz ML-Class

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2002 ml55 amg mecedez car wont start early in the morning after jump the car will run then after 10 hr car will not start is the battery low or alternator going bad

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  • Rudy Cordova
    Rudy Cordova Aug 04, 2010

    I CHECK THE ALTERNATOR WITH ALT TESTER AND THE ALTERNATOR IS CHARGING THE BATTERY TO 14.22 VOLT. WHEN I TURN OFF THE CAR I NOTICE THE BATTERY VOLTAGE IS GOING DOWN LIKE IS DISCHARGING. EVERY MINUTE ON THE BATTERY IS LOSING .01 VOLT AND SOMETIMES IS LESS THAN A MINUTE . PLEASE HELP

  • Rudy Cordova
    Rudy Cordova Aug 04, 2010

    THANK YOU VERY MUCH. AUTO ZONE IS THE FIRST PLACE TO SEE IF BATTERY IS BAD RATHER THAN GOING TO A SHOP MECHANIC.

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  • 1,796 Answers

Hi!!

The battery is either not getting enough charge from alternator or it's not able to keep the charge for too long.

If the battery is the original, I would say it's time for a new battery. The average life span of a car battery it's about 3 to 4 yrs., 2 yrs. in extreme whether.

To pin point the problem more accurrately, drive your vehicle to an AutoZone, Checkers or your Favorite AutoParts store and ask to have your Starting/Charging system checked. I know the first two offer this service at no charge to their customes.

Good Luck!!

Posted on Aug 04, 2010

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Posted on Jan 02, 2017

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