I got the blackpanel feature probably due to upgrade to Nav. I can't remember the exact cost of Nav. The upgrade costs me about 70K to include Nav with bigger screen, rear blindshade and hifi professional. I can tell the performance of Nav's GPS signal is excellent no matter where you are (even surrounded by highrise). Perhaps it makes use of Shark Fin antenna on the car roof. The option of Nav includes more than bigger screen. It integrates into the dashboard showing sign, direction and street name.
