BMW is still in transition with the navigation systems. The newer systems are installed with US maps, then they use a USB thumb drive for the European Maps while you are in Europe. This does not require map reprogramming. The current / previous navigation is programmed with European Maps and has to be re-programmed. The advantage with the new system is that they do not need to re-program the system, the down side is that the USB drive uses the USB port, so you can't use it for your ipod or phone.
2013 650i Individual Convertible (ED)
2011 328i Convertible (retired)
2007 Z4 (retired)
2001 Z3 (retired)