My car needed a new battery and I have the card with the reset codes
for the radio and navigation screen. The code for the radio worked
fine, but the code for the navi system said "invalid code". I spoke
to the dealer who verified it is the correct code. The dealer also
said to disconnect the battery and try again, which I did, but still
nothing. The dealer said to bring the car in if I still have trouble,
but wanted to see if anyone here has any suggestions before I schlep
to the dealer.