yes tony the dvd is readable but scratched, when i set the nav to go somewhere i end up being somewhere else, its not like my tomtom where you just put in a adress and away you go, i need instructions on how to put in an address on this nav, and do you know what size is the nav unit i have in my 2006 toyota aurion presara , i may be able to ge a bluetooth aftermarket one , i think it is 6 inch but not certain . thanks rob