Hi
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.
Thanks!