Hello All... New to MB. Silver hair. Northern Lower Michigan.. USA.. Winter is here... Have a 2023 AMG GLE 53 4MATIC+ SUV. Have a question on the HUD.. There is a little battery symbol in the lower left hand corner... Sometimes. the vertical bars show it is not fully charged or discharged. It seems to change only one bar back and forth over 10-15 minutes of driving. Stays the same with 20 plus minutes driving. Which battery is this? There is a 12 volt and 48 volt battery in the car. Thank you in advance.