The downside is that insurance might make it a requirement to make sure the black box is reading at all times, leaving you with no choice but to use it.Hi mprasetya. I don't know of any way to temporarily secure information stored in the info-tainment system of your QX60. Also consider the personal data stored in the on-board Event Data Recorder or "black box" if you are ever in an accident, e.g., accurate time/date of occurrence, speed of vehicle, % of throttle applied at the time, braking, even who was sitting where (sensors are under your seats). All of this and much, much more is downloadable by investigators and insurance folks. Kinda fun to ponder the ramifications!
You can't lock the nav system but If it is just the address book that you are worried about you can transfer it to a usb stick and delete your book in the car and then when you get it back from service you can load them back up...
To do so you would go to "settings"
then select "address book"
and scroll down to "transfer address book"
and then select "download to usb" or download from usb"
We do this at our dealership so our customers when they get new Infiniti's so don't have to re-enter all the addresses in there new car...