How do you install navigation DVD on Lexus IS250?

To install a navigation DVD in a Lexus IS250, first, ensure the vehicle is in park and the ignition is turned on. Open the navigation system's DVD slot, typically located in the center console or dashboard, and insert the navigation DVD with the label facing up. Once inserted, the system should recognize the disc automatically, and any necessary updates or installations will begin. Follow any on-screen prompts to complete the setup process.