With the ignition switch or 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' or 'Low' 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’.