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Auxiliary Battery alarm 2 weeks after battery replaced??

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Old Jul 24, 2022 | 08:25 PM
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2013 E350 Facelift (Japan Import) 2007 E350 Elegance Wagon, 2014 E350 Wagon facelift model Jap Model
Auxiliary Battery alarm 2 weeks after battery replaced??

Hey guys,

Starting to regret buying this thing!!

I replaced the Aux Battery 2 weeks ago after the original failed, we put the original on a charger and got nothing out of it, I paid for a Benz approved battery supplier brand that was $209.00!!!




Cars been fine since, now today I'm getting this error again and certain functions no longer work.

Has anyone else experienced this before?

Cheers.
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Old Jul 24, 2022 | 11:23 PM
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What was the date on the new battery?
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Old Jul 24, 2022 | 11:36 PM
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Looks the Aux Battery is faulty or not getting enough charge to stay topped up...maybe??

Here it is before and after being load tested...





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Old Jul 25, 2022 | 03:54 AM
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***FIXED NOW***

We found that when I installed the new battery I didn't tighten the terminal leads right up, we found the Positive lead was just loose enough to move it slightly, so that must have been detected and set off the Aux Batt alarm...both leads done up tight and the error has gone with all functions restored.
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