BMW switched map disk providers. They now use Tele Atlas data. You can get the latest 2010 map update disks from a dealer. They setup an online link for North American folks, so there may be a similar link for European folks.

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SOLD
2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input