bgrimmett

car is a 2021 s550battery died and replaced with proper battery. ever since the white charge battery warning has been on. i also replaced the aux battery. charging system is charging well 13.6 to 14.5 volts. my scanner in front sams module shows 0 volts on terminal 15 and says it should read battery voltage. i have checked all fuses and pre fuses, found none blown. a few of the various modules had some codes that did not pertain to low voltage but i cleared everything any way. warning remains. when i look at the instrument cluster pids i dont find any info on the warning at all. nor do i find any info on this warning in the factory shop manual. please help if you can, thanks

WRC-LVR

Is there some sort of battery monitor built into the MB battery? if missing then you might get a code.