Like the topic sais , my display is frozen, i was searching for a song,browseing the mp3 directorys and then the screen blocked, no comand was working, it remained like that for 4-5mins then i stoped the car then i started again the display started at the front meniu(navi,clima,entertaiment,...) but no comand was working then in like 4 mins the screen turned off and a tick sound is heard in the speakers, i cant take the dvd out (its a dvd+r) nothing works. What should i do??