​I just recently purchased a 2008 X5 4.8i, which i love. when i go to bmw website to see if i can update any of the tech in the truck it gives an error code. is there anyone i can download updates via usb for my truck online? also, i inserted a dvd in to the dvd player and my navigation stopped working and is now telling me to reinsert the navigation disk but when i check the truck didnt come with one. the previous owner must have kept it. can i download that as well?