If you have a BMW MK4 satellite navigation system, you can upgrade to one of the later versions of the operating system to access the 3D perspective viewpoint on top of the 2D viewpoint.

The steps to do this are:

1. Get to the secret settings menu.  You do this by going into the Settings menu and holding the MENU button down for about 10 seconds.  When you see this menu, scroll down until you see Perspective where you can select whether you want this option activated or not
2. Go out of this menu and go into the NAVIGATION menu.  In the Viewpoints, you now have three choices: north, driving direction or perspective mode.  Select the last one and see the map turn into 3D.