If this is the factory fit Cd/Radio/MP3 playe
the time can be set for 0 minute or 20 minutes after the ignition is turned off
Select Menu then scroll up or down until you see iGN Time
Then scroll left or right to select 0 or 20 mins
If you want to listen to the radio/CD afte you have removed the Key press the on Button; however I do not know how long the radio stays on for
or see page 19 of the sound system manual that came with the car if its a factory fit player