Dng

Hey guys,
I started getting an issue with my S350 CDI when im driving. I get a red battery in the dashboard. The error in DAS is G2, an alternator error. I did repair the alternator, and still it does it. Now i changed the alternator to a different one and it still does it. Multiple times while driving, the voltage in the battery stays 12-12.2v. I understand that it must not stay like that but it should be in the 13.5-14.5 area with AC on. What do you think is the issue? No other errors in DAS, just faulty alternator G2 code.
While i was driving it today, i had the current data displayed in the dashboard, and whenever bumpy road was ahead and i was driving a litle bit fast, the alternator would start charging it, while in normal, it would lower to 12 - 12.2v. Is there an issue with the alternator, maybe the voltage regulator, or is there a fuse that is responsible for it, or maybe wiring?
Help me out with your opions and if someone had something like this happen before and fixed it.

The images below show the error, and how much the battery is when the car is on, and AC on.
The error code is 2248-004.

Voltage while car is on and AC on. Not charging currently.

DAS code

Dng

Anybody knows the error 2248-004 or 2248-4 ?

Minh

I believed that regulator problem, anywway you need to remove alternator, check all diode and ì it good then problem realted to regulator

Dng

Removed the old alternator, checked it and its perfectly fine in good working condition, still the same issue. I put another alternator with its own regulator, and still the same issue.

I can't seem to find any information related to error 2248-004 in DAS, anyone has a clue ?