Hey forum! Familiar names from rebuilding a 95 E320, but the forum looks rather quiet..

Here we are in the insane 2020, and now my W211 E320 is having issues with the battery warning coming on momentarily, then it also shows the code, Low Battery, Electrical Conven. Unavailable, and will stay in this mode for a while and then returns to normal.

Just changed the serpentine belt and drive pulleys so its not this end.

I will put the meter on the battery and check charge levels which should be around 14 volts, and at 130K miles Im wondering if alternator brushes are due for replacement.

There are some errors related to the rear SAM and possibly a battery controller so if anyone has tips Id appreciate greatly.