Today, BMW decided to include the Google Maps into its 2009 fleet, the exception being the BMW X3. Google Maps will power the BMW Search system which will be available only in the vehicles equipped with BMW Assist and Navigation system.
http://www.bmwblog.com/2008/09/15/bmw-search-powered-by-google-maps/

Google's most innovative product named, Google Maps, will be part of the MyInfo system and it will improve the the current BMW Assist Navigation System. A mouse click will allow up to 10 destinations to be sent to your screen and the most fascinating part is that all the date is shareable, you can simply have the data uploaded to your car or to others people BMW's equipped with the navigation system.
http://www.bmwblog.com/2008/04/14/bmw-myinfo-exclusive-to-the-bmw-x6/