mercmadrab

Hi There, I have a 2009 C220 Sport, problem is NAVI wont work it just saying "Please Wait" other problem is it was saying Change NAVI Disc from slot 6, when I pressed eject from slot 6 the slot went blank but no disc came out, now it wont allow me to put any discs in? all slots are showing empty but it wont let me put any disc in, it seems like something is stopping discs going in??? only bought car 3 days ago so don't want to force disc in just in case I need to bring it back to where I bought it> can anyone HELP???