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Red battery visit workshop message

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by kalsingh1, Aug 12, 2014.

  1. kalsingh1

    kalsingh1 Senior Member

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    Joined:
    Feb 4, 2005
    Location:
    Walsall, West Midlands
    Your Mercedes:
    SL55 AMG 2004
    Hello all

    I bought a mercedes SL500 R230 2002 about six months ago with a red visit workshop message. It was checked at time do sale by WDM in Birmingham with the stars system, and was advised it was not a serous issue and to carry on with the purchase.

    To date I have replaced both batteries from Merc. Red message still there after reset. Code pointed to K57 battery relay. Replace with new relay yesterday from Merc. Havnt been for reset yet but red message still there.
    I am a bit confused now, car seems to be working properly, I am just fed up of seeing this red message.
    Can anyone help please and tell me what to do next to switch this message off. Thanks
     
  2. television

    television Always remembered RIP

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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    If the batteries have been disconnected its important to re connect in the right order, starter battery first, then the rear one. Doing it the wrong way can put the lamp on (not every time)
     
  3. OP
    kalsingh1

    kalsingh1 Senior Member

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    Joined:
    Feb 4, 2005
    Location:
    Walsall, West Midlands
    Your Mercedes:
    SL55 AMG 2004
    The starter battery was the first one to be replaced and then the battery in the boot 4 weeks later.
     
  4. television

    television Always remembered RIP

    Messages:
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    Joined:
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    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    It is the order in which you connect them that matters. if you remove the front one and you did, the rear one should have been disconnected first.

    So do try this now, disconnect both batteries, then join up the front starter battery, then join up the rear one.

    You will have to reset the windows and the ESP lamp will go away as you drive.
     
  5. OP
    kalsingh1

    kalsingh1 Senior Member

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    Joined:
    Feb 4, 2005
    Location:
    Walsall, West Midlands
    Your Mercedes:
    SL55 AMG 2004
    Thanks I will try that and report back. Silly question how do I reset the windows?
     
  6. television

    television Always remembered RIP

    Messages:
    164,074
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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Turn the ignition on, raise each window in turn on the slow lift (switch not fully pressed) and hold the switch for 4 seconds once closed.
     
  7. OP
    kalsingh1

    kalsingh1 Senior Member

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    Joined:
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    Location:
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    Your Mercedes:
    SL55 AMG 2004
    Ok tried that. The light went off for a while and didn't come on for several starts. When I left the car parked for a while the red message came back up.
     
  8. television

    television Always remembered RIP

    Messages:
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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Then it looks as thought the N82/1 battery inverter module has failed.
     
  9. OP
    kalsingh1

    kalsingh1 Senior Member

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    Joined:
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    Location:
    Walsall, West Midlands
    Your Mercedes:
    SL55 AMG 2004
    Is that a expensive item.

    Where do I find it and is it just a straight swap ?
     
  10. television

    television Always remembered RIP

    Messages:
    164,074
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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    It sits just behind the far end of the main battery in the trunk, it fails on a similar system in the 211 much more than on the 230, it could be damaged being left so long with the batteries incorrectly joined up.

    It could be worth putting the car on STAR to double check, it is CAN operated.

    Price I do not know, but nothing is cheap on these cars, it should be just plug and play as it should come coded to your car from the factory.
     
  11. S.Speed

    S.Speed Senior Member

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    Location:
    Lancashire
    Your Mercedes:
    Saab 9-3
    Excellent Malcolm..
    Damned good to have you back.:)
     
  12. OP
    kalsingh1

    kalsingh1 Senior Member

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    Joined:
    Feb 4, 2005
    Location:
    Walsall, West Midlands
    Your Mercedes:
    SL55 AMG 2004
    UPDATE.
    Convinced now that it must be the Battery Control Module, took it to a local garage who is good with electrics. They just happened to have a spare BCM and swapped to try. The red battery warning message went away. They put the old one back and left the car for 30 mins and the message came back. They rang me to collect car in morning and they would check for battery drain over night. In the morning they started car and the red message disappeared and they reported no battery drain. Been driving for a few days and all is well. To think I was about to but another used Battery Control Module for £250.
    What the hell is going on here?
     
  13. OP
    kalsingh1

    kalsingh1 Senior Member

    Messages:
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    Joined:
    Feb 4, 2005
    Location:
    Walsall, West Midlands
    Your Mercedes:
    SL55 AMG 2004
    Guess what, after a good few days the red warning battery message is back on. Can anybody with experience advice please.
     
  14. OP
    kalsingh1

    kalsingh1 Senior Member

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    Joined:
    Feb 4, 2005
    Location:
    Walsall, West Midlands
    Your Mercedes:
    SL55 AMG 2004
    Just to update this old thread. I ordered a used BCM module from the USA with an updated part number. The problem is solved.
     
  15. r129MAN

    r129MAN Senior Member

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    Joined:
    Sep 21, 2006
    Location:
    Holbury Southampton
    Your Mercedes:
    SL500-2004
    Red battery warning message.

    Hi, had a similar problem with my SL500, had to have 2 off relays replaced as noted below.

    Hi All - as promised update on my problem. Got car back from Pentangle MB yesterday all fixed. Issue was with K57 & K75 relays, both replaced, red warning on dash display gone & malfunction all cleared. Hope that is last problem for my car for while, now going to enjoy driving it in the sunshine. Again thanks to all for replies & advice.
     
  16. E500 Pete

    E500 Pete Senior Member

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    Joined:
    Mar 9, 2009
    Location:
    Essex
    Your Mercedes:
    S500 (W222) 2014. Turbo 4.7 V8 with loads of toys. Superfast luxury.
    Hi, .Same problem

    Can I ask how much the relays were and if they were a DIY job.
     
  17. E500 Pete

    E500 Pete Senior Member

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    Joined:
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    Location:
    Essex
    Your Mercedes:
    S500 (W222) 2014. Turbo 4.7 V8 with loads of toys. Superfast luxury.
    Hi,

    There seem to be a lot of these on e-bay. Did the module need to be coded to the car or was it just a swap
     
  18. E500 Pete

    E500 Pete Senior Member

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    Joined:
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    Location:
    Essex
    Your Mercedes:
    S500 (W222) 2014. Turbo 4.7 V8 with loads of toys. Superfast luxury.
    Solved my Battery light

    Hi,
    Just had mine checked by Clive at Benzworks. Diagnosis was consumer battery.

    Bought a new one from Mercedes £78 inc VAT.

    Swapped it over and the light was still there so I then disconnected both battery negative cables, left it for a few minutes and reconnected (big battery in the boot first).

    All OK now and it didn't even lose the settings on the radio or seat memory.
     

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