Hmmm... that's a weird one... I think since you have the Nav the process to link it up is different, but the code or "passkey" as BMW refers to it is on the original owner's literature. I did not have that literature so I had to take it to the dealership. They charged me around $65 for them to hook up to my X5 computer and download the code. Have you looked at some of those videos on the BMW website?... there's a lot of info in there...