Lexus 2012 RX450h Owner's Manual page 316

2-4. Using other driving systems
Customization of the intuitive parking assist (vehicle with the Lexus
Display Audio system)
The buzzer volume, display and buzzer timing and display of the graphic
on the screen can be customized.
Press the "MENU" button on the Lexus Display Audio controller.
STEP 1
Select "Setup" on the "Menu" screen.
STEP 2
Select "Vehicle" on the "Setup" screen.
STEP 3
Select "LEXUS Park Assist" on the "Vehicle Settings" screen.
STEP 4
When you complete settings, select "Save".
STEP 5
316
Alert volume setting
Display on/off
Alert distance setting