Incredibly the dealer readily admitted that there IS a set procedure to manually recalibrate the nav system to the GPS. I haven't taken it in yet, but I'll let you know what happens. Since my system announces that I've arrived at my destination approximately .2 miles before I get there, recalibration, or something, is definitely in order. Other than not knowing exactly where the car is relative to the final destination, it works as advertized.
If you don't mind...when You have yours re-calibrated...please ask if there is a TSB number or how would another dealer find the information to recalibrate?
Mine is about 100 feet "OFF" .... it shows the car actually "BEHIND" of where the car really is.
You can drive "PAST" the street..."THEN" it tells you..."TURN NOW"...