1. Turn on the car music system: Turn on the car music system after starting the vehicle. It can be operated through the touch screen, knob or control button of the vehicle.

2. Enter the music playing interface: in the main interface or menu of the car music system, select "Music" or related options to enter the music playing interface.

3. Select playback mode: in the music playback interface, find and select "playback mode" or similar options. Different models and music systems may have different locations and names.

4. Select Random Play Mode: In the Play Mode option, find "Random Play" or similar option and select it. This will enable shuffle mode.

5. Start playing music: After returning to the music playing interface, select the music list, album or song you want to play. The system will randomly play the music you selected.