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Fault Codes - How to clear?

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by sl5, Dec 31, 2012.

  1. sl5

    sl5 Senior Member

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    Your Mercedes:
    SL500 R230 11/2002
    Hi
    car: sl500 2002

    i have a battery warning light on my dashboard, i have changed my regulator but i know i have to erase the fault codes. i thought it was done by removing the AGM battery, or do i have to go to Mercedes to erase them?
     
  2. EmilysDad

    EmilysDad Senior Member

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    Your Mercedes:
    ML350
    Although I'm not an expert on MB cars yet, I'd say that the car still has a fault ... hence the warning light :confused:
     
  3. television

    television Always remembered RIP

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    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    You cannot erase this message as the alternator is not working, it will go out when working but on the 230 you have the battery inverter and the fault could be on that.

    It may help if you measured the voltage over the rear battery where it should be 12.5 volts when off and 14 volts near enough with the engine running.

    Have you disconnected the front battery at any time
     
  4. OP
    sl5

    sl5 Senior Member

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    i just spoke to an electrician, he said i changed the wrong regulator?!
    i didnt know it had two? does it?

    i bought the regulator from mercedes for £27.. he said theres 2 regulators, 1 at the back and 1 on the side..
     
  5. television

    television Always remembered RIP

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    Only the one that is 47

    [​IMG]
     
  6. OP
    sl5

    sl5 Senior Member

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    thanks, i thought so.

    i just drive my car and just realize and failed to mention that the amber lights on the buttons (ac, fan knob, etc) are faint in brightness. it was once bright. did this change because my cluster brightness level changed? i thoguth this was only for the dials only
     
  7. DY2

    DY2 Senior Member

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    Your Mercedes:
    W211 2003 E320 Cdi Automatic
    Battery could do with charging perhaps since the alternator regulator has been changed
     
  8. OP
    sl5

    sl5 Senior Member

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    charge the accessory battery (rear) right?

    i already done that, it charges full within 10min. seems odd,
     
    Last edited: Dec 31, 2012
  9. DY2

    DY2 Senior Member

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    Your Mercedes:
    W211 2003 E320 Cdi Automatic
    Do you have a voltmeter?
    What are the readings over the battery terminals?
    Should read 12.5v with engine off and 14v with engine on.
     
  10. DY2

    DY2 Senior Member

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    Your Mercedes:
    W211 2003 E320 Cdi Automatic
    Unsure if your model would have a small battery in the front. Some cars have. Worth checking.
     
  11. television

    television Always remembered RIP

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    All 230's have , its the starter battery ;)

    He could have a blown maxi 100 amp fuse
     
  12. OP
    sl5

    sl5 Senior Member

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    wheres the maxi 100 amp fuse ?

    the fuses in the passenger footwell. if so, i can get to it but how the hell am i supose use a tool to take that out, its hard to get my arm in there
     
  13. television

    television Always remembered RIP

    Messages:
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    I may have something on this but I cannot check till later in the day, your other request has been taken care of
     

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