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Battery drain

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Old Nov 7, 2021 | 12:43 PM
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At127
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2016 GLE
Battery drain
Hi,

I recently bought a 2006 E350 and suffering from the mysterious battery drain. I replaced the main battery and it drained in 1 day. The auxiliary battery reads at 12 amps. Is this an issue with the voltage regulator or the battery control module if only the main battery is draining?

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Old Nov 8, 2021 | 10:00 AM
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rapidoxidation
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From: In the Shadow of the Tetons
2013 ML350 Bluetec
or a seat controller or a radio or a window switch or.... automotive electrical diagnosis isn't easy but it can be done methodically.
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