Ive had my MK3 crash several times with the cd inside, with version 23, 26 & 27.I managed the eject cd after pressing for a while de cd button,
After The nav had no power led & did not show on the menu....
I unscrewed the unit, lean in down at an angle, insert v27 cd and after several tries the update menu came back on , unit started working again and cd was eject. Everything back to normal. I must say I was playing with the machine for 3 days, trying to swap languages, downgrade, upgrade etc..