Originally Posted by Frac
How did you go with the upgrade Nubzub?
I have a 2006 525i and am keen to upgrade the navigation.
Mine just has the arrows so I'm not sure whether it will work.
The 2006 5 series uses iDrive and isn't the same as the MKIV set up in the Z4.
All models of Z4 share the same nav setup (and radio) as the X3 (till about 2009/10) and the same nav software was used on the e39, and e46.