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SL55 Tyre pressure monitor AWOL

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by SL55 Mark, Oct 26, 2012.

  1. SL55 Mark

    SL55 Mark Senior Member

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    Your Mercedes:
    2004 SL55 AMG
    I've read the manual, and searched on here. No error messages or anything. Looks like maybe the system has been turned off or something. According to the manual, when I cycle thought the menus, tyre pressure display should come up. It doesn't. I don't see any error messages. It's almost like the car doesn't have the system fitted, but I think it does, it's one of the factory options.

    I may have to use an old fashioned tyre pressure gauge if I can't find it. Shock horror. :D
     
  2. Alps

    Alps Senior Member

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    Your Mercedes:
    SOLD - 2013 Weistec E63 AMG
    its not factory standard, it was a optional extra!

    look for option code 475 on your datacard at the back of your service book, this will confirm if you have it or not!

    just because its in the manual, doesnt mean you have it!
     
  3. OP
    SL55 Mark

    SL55 Mark Senior Member

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    Your Mercedes:
    2004 SL55 AMG
    Data plate under bonnet definitely says 475 (see photo)

    Does that mean I have tyre pressure monitoring ? What do the other codes mean ?

    [​IMG]
     
  4. television

    television Always remembered RIP

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    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    It is possible that it has been turned off. I had the system on my 230, it was the direct system with the senders built into the valves in each wheel, if the stems are all metal then they are there, but the batteries could have expired, as their life is 6 years,,, at over £100 per valve its an expensive thing.

    You could always have the senders fitted and the system re activated
     
  5. OP
    SL55 Mark

    SL55 Mark Senior Member

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    The valve stems are all metal. How do you turn it on, is that a trip to MB plus £400 ? Think Ill leave it off, if so. Seems a shame tho'
     
  6. television

    television Always remembered RIP

    Messages:
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    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    I had to delete mine completely as it was a pain every time you started with the warning message coming up, as I put above, the batteries are built into the valves and just so expensive. When the car is serviced you can ask to have the system turned back on. This system is not so popular as it was as these days you can have the indirect system form the wheel speed sensors, but this cannot be done on many pre 2005/6 cars.

    Note, to replace them cost £400 plus each tyre has to be removed and re fitted so a bill of £500
     
  7. Alps

    Alps Senior Member

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    Your Mercedes:
    SOLD - 2013 Weistec E63 AMG
    yep you have TPMS, the sensors in each wheel are now £129 each from the dealers!

    you can get them for about £80 odd each from other places.

    its probably turned off as TV says as the irritating messages pop up on the dash.

    i had to replace all of mine to get the system working again!
     
  8. npuk

    npuk Guest

    The sensors last about 5yrs before needing replacing. Most likely one or more sensors failed so the owner had the system turned off. Needs to be reactivated via STAR.

    You can get the sensors from: http://www.alloywheelsdirect.net/tpms
     
    Last edited by a moderator: Oct 28, 2012

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