Hi, I can't find anyone else who has done what I am considering doing, which is to install a RSN-E Nav Plus unit from a 2006 a4 into a 2002 a4 (now there is a non Bose symphony II ) by trying to cut the harness wires from the 2006 and then matching them up with the wiring in 2002 a4 (which would also have to be cut or removed from the harness plugs). The reason why I am looking at this option is because I have access to a salvaged 2006 a4 with a navigation system. I was wondering therfore if there are easy to follow colorcoded diagrams of the wires in the harnesses in order to match them up between the 02 and 06 a4. I know it's crazy but I figured why not try to see if this can be done. Any help will be greately appreciated!