Looks interesting!

http://cgi.ebay.co.uk/ws/eBayISAPI.d...742036231&rd=1

 

Yeah but I'm not sure that head unit has nav. Its a bit hard to read the button lables but I though the center button is labeled on the nav unit and this picture is showing that button is not. Going from memory here but lat time I was at dealership they has a roadster with nav and that was the only differance I can recall seeing on the face.

 

NAV button is the farthest one to the right.