On my 2008 528i (Mfg. 01/2008), I usually experience a 5 - 10 minute delay for the Navigation system to properly identify the cars correct position. This only happens if the car has not been run for approx. 8 hours. If car is turned off for less time, Nav. properly locates the car almost immediately after screen gets past warning message. If map view is turned on, the car's location is off the travelled road by some distance. Altitude is also not displayed, until system locks in. If car is taken over exact same road after Nav. is "warmed up", car location (and Altitude) is reported correctly. I am curious if anyone has had a similar issue with their BMW Nav. system. Local BMW dealer was able to duplicate the problem by having the car overnight, said they fixed it, however, problem still exists. Another strange problem, sometimes the volume control, iDrive selector, etc. do not work after the car is started. This lasts only a very short time, maybe a minute but is annoying, for a $55k car. My 2005 530i never had this problem. Also, my wife's 2008 Lexus RX350 Nav. system works correctly - instantly. Anyone with similar problems or ideas?