The wifi facility is not available in Pak. yet.
Actually in Japan & Korea, the Wifi is available in the cars. I saw it by myself during my last visit to South Korea. I travelled in Taxies and they had wifi to use. But this facility isn't available in Pak. yet.
Buttons, 1-6, seems it can take upto 6 DVDs/CDs at once time and you can select any of them to play. This system is also available in Honda Civic in Pak. where the CD changer is located in underneath of front seat (not of driver).