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Thread: ASR light

  1. #1
    Junior Member
    Join Date
    Jan 2013
    Posts
    20

    ASR light

    When I drive my Mercedes 500E for 20min
    the ASR light comes and the car goes to limp
    mode.



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  2. #2
    E500E Guru maw1124's Avatar
    Join Date
    May 2011
    Location
    FL & MI, USA
    Age
    46
    Posts
    1,481

    Re: ASR light

    Neutral Safety Switch would be my first guess. It's exactly that, a guess. But it's a cheap enough guess that it's worth trying. It's also a known fault.

    Mine would do that when the car got warm. Stop the car, restart it, fine until it goes into limp mode again. NSS fixed all of that for cheaper than it would have taken to poke and prod to "diagnose". That one was for me a 500EBoard special. "Humor me, just throw one in. Don't diagnose. Everyone on the E5E Board says...

    maw
    Last edited by maw1124; 06-04-2018 at 03:37 PM.

  3. #3
    .036 Hoonigan™
    E500E Boffin
    gsxr's Avatar
    Join Date
    Dec 2008
    Location
    Boise, ID, USA
    Posts
    21,325

    Re: ASR light

    Need to clear codes on the E-GAS module, then pull codes again the next time it goes into limp mode. Preferably digital codes via SDS. That will narrow it down.

    maw is right though, if the NSS is old or original, it should be replaced on principle after 25+ years. Pretty much all of my cars needed the NSS replaced at some point.


  4. The Following User Says Thank You to gsxr For This Useful Post:

    maw1124 (06-04-2018)

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