After replacing the battery, I noticed that my Nav system was placing my location about 100 miles to the west and tracking the wrong map location. I successsfully updated my E38 MKII Nav OS using the instuctions found in this forum thinking that that would fix the problem. However, the reported location is still wrong. I checked it against my handheld Garmin and the coordinates are in fact significantly in error. The GPS seems to be tracking OK when I drive, just on the wrong map/roads. So I think the antenna must be working OK. I entered my current location, but it still would not correct. Can you suggest a resolution to my problem?