M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

COMMAND battery drain

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Old Dec 22, 2021 | 08:46 PM
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camplate's Avatar
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S550
COMMAND battery drain

Know that this isn't my vehicle, it is brother in laws. I may have model and year wrong but I think it is a 2005 ML 350. Anyway, there's been twice now that they've let the vehicle sit for more than a week and the battery was completely dead. They took to dealership and dealership 'thinks' it is the COMMAND that is draining the battery and want 3000+ to fix, with no guarantee. Any advice? Any wiring diagrams I can look at, once I get correct model and year? Fuse(s) I could pull to measure amperage? Or how to take dash apart if I need to?
Not trying to say it like 'my dad has set of tools'; I used to do competent level electronic repair but that was a long time ago and I don't have a test bench anymore. I can do some things, but not everything.
I will update this post when I have better information. Thanks.
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Old Dec 23, 2021 | 05:03 AM
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Please call your BIL and get the exact year & model it is.

When your BIL jump started the veh.. was there Audio on the radio?

When the ML was taken to dealer, did they charge your brother-in law ? If sow, they must have given him a bill.

If so, post a photo of the bill which should include the codes of the problem in COMMAND.

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DTC Radio-MCS.pdf (54.2 KB, 105 views)

Last edited by Maj. Dundee; Dec 23, 2021 at 06:29 AM.
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