@Gosta The warnings are there because it is possible that the airbags are firing by accident. Usually nothing like should happen. Delete the DTCs from outside the car and wear ear protection. Just in case...😎
The DTCs are most probapbly the result of the low battery, but as your IAM seems to be offline/not communicating at all, you should first check all fuses.
You should also connect a charger/tender. 12,3V is way too low to programm your car.
And if you have any 3rd party antivirus/security/VPN program installed set it to permanently disabled and reboot the computer.