To avoid any confusion,my beamer is a model from 2009 and doesnt have the idrive with hardisk .It still uses the dvd option for navigation.

And from the day i received may 2009 untill 2010 jan..i could use the full screen and then it stopped.I have checked in other forums and people seem to have had it even before 2009...some one from 2007 had a similar issue.So, i suspect that the version used was earlier version when the car was shipped out in 2009.Regardless, that version was indeed the good one..after my complain..it was updated probably to latest and there is 30% blank screen when I do the exit -window.
absolutel waste of the screen... the 30% screen blank and doing nothing..... what kind of design is that????