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.

However, even if 'Off' is selected, the system volume will not turn off but the volume will sound as 'Low'.

If you change the Warning Volume, the Warning Volume of other Driver Assistance systems may change.