I had a few questions about the AVIC-N1 unit that maybe someone who knows a lot about this unit or who has had previous experience with can help me out.  First question is does the speedometer on the unit display the proper speed via supplied gps antenna or are there wires I need to connect to the vehicle somewhere?  And also I have heard that upgrading the N1 unit to the N2 disc will make it so my vehicle has to be moving to show DVDs.  Is this true?  Any help would be appreciated.  Thanks.
 
 
n2 takes some work to play video will driving.  Also you need to tap the VSS wire for the speedo to work.