With the ENGINE START/STOP button in the ON position, select 'Driver Assistance → Warning Volume' from the Settings menu to change the warning volume to 'High', 'Medium', 'Low' or 'Off' for Forward/Reverse Parking Distance Warning.

Parking Distance Warning Auto On is activated or deactivated when you select ‘Setup → Vehicle (Infotainment System screen) → Driver Assistance → Parking Safety → Parking Distance Warning Auto On’.