I have noticed what I think is similar to what you described. When I park in the garage after a ride and step out I will hear electronic type buzzing of what I expect to be systems shutting down. Even as I lock the doors and walk away I can hear it. Always did it so it doesn't concern me as it doesn't sound like a noise of something broken or wearing to me. Also, I still notice the backlight on the center display so that confirms some things are still active and shutting down.
Hope this helps ease your mind. Enjoy the ride!?
Hope this helps ease your mind. Enjoy the ride!?
