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Auxiliary Battery Malfunction error

This is a discussion on Auxiliary Battery Malfunction error within the Mercedes CLA Australia forums, part of the Mercedes-Benz CLA World Forums category; Anyone has experience or have seen this error message before? I wanted to understand what's causing this malfunction and how to fix it? I'm guessing ...

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    Rookie SirCLA's Avatar
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    Auxiliary Battery Malfunction error

    Anyone has experience or have seen this error message before?

    I wanted to understand what's causing this malfunction and how to fix it?

    I'm guessing this auxiliary battery is a back up battery or some sort, but not entirely sure if I can still drive around with this malfunction or best to take the car into MB service ASAP!Name:  ImageUploadedByMercedes CLA Forum1469190649.885164.jpg
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    Thanks in advance for any info or advice.

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    RSM
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    I had the same error message which was preceded by a slew of other messages which led in a few instances of the car becoming immobilized. It would either just turn off (when parked) or would not start. I would suggest you drive it as little as possible and take it in. They will in all likelihood just replace the battery. I've not had a problem since then and it has been over a year since the error message appeared.
    Last edited by RSM; 07-23-2016 at 05:52 AM.
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    Pro 07SGT's Avatar
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    I would take it in asap before you are stranded and while, hopefully, it is still under warranty.

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    Rookie SirCLA's Avatar
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    Thanks for the info RSM!

    Yes it's still under warranty. Only had the car for just over a year.

    Okay, will talk to my dealer next week and book the car in.

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    Rookie SirCLA's Avatar
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    Auxiliary Battery Malfunction error

    Just letting everyone know the dealer had fixed my problem under warranty. Thanks!
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    jmc
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    Quote Originally Posted by SirCLA View Post
    Just letting everyone know the dealer had fixed my problem under warranty. Thanks!
    So was it just a dead small battery or .... ??

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    Rookie SirCLA's Avatar
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    They end up replacing the electronic capacitor unit.

    The new C class (w205) does not have an auxiliary battery in it - so I've been told by them!

    Hope that helps.

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    jmc
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    Quote Originally Posted by SirCLA View Post
    They end up replacing the electronic capacitor unit.

    The new C class (w205) does not have an auxiliary battery in it - so I've been told by them!

    Hope that helps.
    Forgive me for being a little confooozed ... are those gauges you posted before from a W205 or C117?

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    Rookie SirCLA's Avatar
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    Ah yes, it's taken from my W205!😄

    Those of you who know me from this forum going back last year, know that I have a 2015 W205!

    Sorry for the confusion to anyone. I just wanted to reach out to all MB enthusiasts for some advice and info about this error message.

    And thanks to RSM, for additional details.

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    Newbie alinaamanda's Avatar
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    hi guys, i googled for the same issue i believe there should be some kind of voltage converter aka auxiliary batter like this one https://xenons4u.co.uk/mercedes-benz...converter.html
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