So this is the C-Nav verison of nav plus right? Are there any major differences between this and the D-Nav. Also does anybody know the part number for the harness to install it in a 2000 S4? Also someone said this is a text based nav system, is that different from the D-nav? Does this mean there are no actual maps showing you where to go, im not sure I really understand. Also can it played copied nav map discs or only originals? Thanks!!