Ahh good we are on the same page then.

Also my sat nav has to be on a Aux port as supposedly the nav button the VPA is only for the Jap nav system. I am disappointed that I can't run the Nav Video with music but speaking to my installer the other day, you can get an alpine lead which MAY be able to be spliced into the screen input to get the nav screen on with sound. I hope it works! The car is booked in on the 2nd july to get the work done.