You can change the warning volume for the Remote Smart Parking Assist system to 'High', 'Medium', 'Low', or 'Off' by selecting 'Driver Assist → Warning Volume' in the Settings menu when the ignition is in the ON position.
However, even if 'Off' is selected, the warning volume for the Remote Smart Parking Assist does not turn off, but will be automatically set to 'Low'.
If you change the warning volume settings, the warning and guidance volume of other Driver Assist systems may also change. Be sure to check the warning volume before changing it.