Yeah It did work in the car. The original AVIC-D3 installed in the car - had a malfunctioning DVD player, mechanism broken, navi system would not work. I know before the DVD system broke, all those buttons were working OK
I bought a working used D3 unit. I unplugged all from the old unit, installed the "new" unit (basically took 15 mins). Everything is working expect the navi buttons are all greyed out, cant input an address, etc..