2001 Mercedes-Benz S-Class Logo
Posted on Dec 27, 2010
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On my 2001 Mercedes s500, I have replaced the alternator twice and battery three time , yet still have problems with the battery dying . The dealer and my personal mechanic can not figure this out. Have you experienced or heard of this problem before. A long charge on the battery will get it started again. However, the problem will return. thanks, Andy

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Colin Stickland

Colin Stickland

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  • Mercedes-Benz Master 22,516 Answers
  • Posted on Dec 27, 2010
Colin Stickland
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Joined: Nov 04, 2008
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Yes if a recon backstreet alternator is used ,fit a genuine bosch factory exchange unit ,try disconnecting the battery and see if it still goes flat as usual cause is the diode pack in the alternator backfeeding to earth ,hence the bosch unit ,failing which go into the power distribution box and disconnect each circuit in turn to try to find the dran ,most cases it a boot light staying on ,another favourite is a boom boom amplifier staying on ,you know a boy racer big amp in the boot .On my 2001 Mercedes s500, - alicantecoli_17.pngalicantecoli_18.png

  • 1 more comment 
  • andrew_ta581 Dec 27, 2010

    Many Thanks for the quick response.

    Will you please elaborate more on the boot? Are you referring to the trunk light?? If so, what should be my approach to resolve.

    Also, the boom boom amplifier, how do I isolate the problem to the amplifier?


    Thanks again!

    Andy

  • Colin Stickland
    Colin Stickland Dec 28, 2010

    So you do have a fancy amp in teh boot and massive speakers ,well remove the bulb in the boot if in doubt and disconnect the amplifier at the source ,ie the battery in the normal power take off for these and then see what happens

  • Mikky S
    Mikky S Aug 25, 2014

    Add an aditional power or solonoid/starter switch to power the amp. For the boot you can change the lamp switch or fix an alternate on-off switch for the lamp to light up

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