My nav system is lost! It thinks it's 100 miles or more away from where it is. I could understand if it didn't work at all or just didn't know where it is, but it works just as it always has except that the icon is way, way off. I did a search and read several posts that mentioned being slightly off (worst being about 5 miles) and occurring once or just a few times, but mine is lost and I can't get it back! Any help would be appreciated, as I am nearly 2 hours away from my dealer.