what would cause the radio light to stay on and the navigation light to flash on the mmi?

Hello, basically - you need a specialist to have a look at this. There's nothing easy. The only thing that comes to mind is maybe a door switch -- one that suggests the driver's door is open. If it doesn't trigger the door open, then it may not shut down vehicle accessories. See a shop near you: www.repairpal.com/repair-shops