Locate the tilt or load/eject button on the dashboard panel. Pressing this will cause the motorized navigation screen to tilt open, revealing the hidden disc drive.
: Place the new update DVD into the slot. The system should recognize it automatically and begin loading the new data.
Turn on your vehicle and press the "Info Phone" button on the bezel surrounding the screen.
Sources and further reading
Put your Prius into Accessory (ACC) mode or full READY mode so that the radio powers on. Do not shut off the car during this process.