Thanks guys, put unfortunately when I say the LEXUS NX wipes the I pod it does just that. I have to restore the I pod contents on the computer, when you plug the I pod back into the USB port all is good, go to the radio listen to a radio station then try to return to the I pod it is wiped or the USB says there is nothing connected.
Hopefully the dealer will come back with a solution
Bit disappointing really expected more from LEXUS