R230 Need help identifying issue with Battery Control Module

Gunnybar

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Jun 17, 2023
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Your Mercedes
R230/2005/M112
Hi all, new here and needing some help

Im working on a 2005 R230 SL350 and the only fault left to fix are to do with The ESP system, I have a few fault codes with the only current code being 5B1 3 which is listed as ‘Check Control Unit N82 (Battery Control Module)’, Ive looked around and can’t find much on what this means in terms of how to fix the issue it is having.

The other stored fault codes are for Undervoltage Supply, Voltage Spike and for the CAN communication with the module although none seem to be current.

If anyone knows where to point me for addressing this issue I would be forever grateful, been searching and scratching my head all week.
 

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