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W203 battery warning light

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by Jamie ward, Dec 2, 2019.

  1. Jamie ward

    Jamie ward New Member

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    Your Mercedes:
    2003 w203 220cdi
    Hi all. I bought a new leather interior for my w203 c220cdi. The seats were exactly the same apart from 1 plug on the passenger seat. After putting it all together i started the car and the check alternator and battery light came on and has stayed on. Is there anything connected to the seats that could do this or just a random additional problem. Cheers for any help.
     
  2. Oldspanners

    Oldspanners Senior Member

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    Location:
    Normandy
    Your Mercedes:
    C CLASS 2004 C180
    Have you checked the fuses in case the odd plug has a different function than on the previous seat, are they heated for example.
     
  3. OP
    Jamie ward

    Jamie ward New Member

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    Your Mercedes:
    2003 w203 220cdi
    Would that cause the battery light to come on????
     
  4. Oldspanners

    Oldspanners Senior Member

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    Your Mercedes:
    C CLASS 2004 C180
    I have no definite idea but it's too much of a coincidence.
    If you've blown a fuse it could cause a lot of different problems.
    Check all three "fuse boxes" under the bonnet and the end of the dash drivers side and in the side of the boot passenger side.
    Or check if you disturbed any connectors when you had the interior out.
     
  5. OP
    Jamie ward

    Jamie ward New Member

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    Your Mercedes:
    2003 w203 220cdi
    Ill have a look in a min. Cheers for the help.
     
  6. Blobcat

    Blobcat Moderator

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    Location:
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    Your Mercedes:
    R171 SLK280 3.0, Land Rover 110 County SW
    When you were doing the work was the interior light on? Thinking the battery might have drained somewhat whilst you were undertaking the work.
     
  7. OP
    Jamie ward

    Jamie ward New Member

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    Your Mercedes:
    2003 w203 220cdi
    Yes it was but ive bought a new battery. Would the battery light need resetting or would it go off automatically
     
  8. Blobcat

    Blobcat Moderator

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    Your Mercedes:
    R171 SLK280 3.0, Land Rover 110 County SW
    Should go off once it’s charged.
     
  9. umblecumbuz

    umblecumbuz Senior Member

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    Your Mercedes:
    S204 and CLC 204 cdi, other non-Merc machines
    A new battery might have been standing around for a long time, losing charge the while.
    NEW doesn't mean FULLY CHARGED.
    And in disconnecting and reconnecting, something obscure may have triggered the light.
    Why not fully charge the battery, and use a good code reader to identify any fault codes and remove them?
    (and with the 203 you might have many codes showing, but most of these will not be relevant to your battery light).
    You may also have to reset a few things, like window open/close, power steering settings.
     
  10. Rappey69

    Rappey69 Senior Member

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    Your Mercedes:
    c220 w204 amg sport
    Not that this is of any help but when I had my w203 (2002) the interior lights would never come on if it was daylight, only when it got dark ?
     
  11. Blobcat

    Blobcat Moderator

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    Your Mercedes:
    R171 SLK280 3.0, Land Rover 110 County SW
    My W211 was the same, I thought they were faulty when I first had it...
     
  12. OP
    Jamie ward

    Jamie ward New Member

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    Your Mercedes:
    2003 w203 220cdi
    Ive tested the new battery...12.8v
    When idl9ng the charge rate is 14.1. I dont understand why its come up.
     
  13. mioba

    mioba Senior Member

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    Location:
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    Your Mercedes:
    W124/1994/E200, W220/2004/S320CDI, W205/2016/C200, W447/2017/3.0 CDI
    Alternator is fine then
     
  14. OP
    Jamie ward

    Jamie ward New Member

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    Your Mercedes:
    2003 w203 220cdi
    Ive bought a new alternator.
     
  15. mioba

    mioba Senior Member

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    Your Mercedes:
    W124/1994/E200, W220/2004/S320CDI, W205/2016/C200, W447/2017/3.0 CDI
    gonna get expensive!
     

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