Hi all, i have this problem, some times it is not predictable, when i remove the key from the car, the Nav screen does not turn off, i put again the key in the car and does not change anything, if i turn on the Radio the Sound goes and not goes, also the bluethoot works and do not works the voice goes and does not go. The Harmon Kardon Amplifier remain turned on.
For two times the screen remained turned on during the night and the battery was completely down so the second time i changed the battery in the morning.

Any solution regarding this?
Thanks

ANybody with this problem?
please
thanks

Ihave take the car to the Official workshop