[adzoesch]

Thanks - I have the JBL 3-in-1 AM/FM/Cassette/6-Disc CD Changer w/8 Speakers (non NAV)

Actually, I'm speaking of the rear seat audio controls - gives the rear passangers the ability to listen to any of the sources (CD, Radio, etc) via headphones regardless of what the head unit is set to - has display on roof with remote to change source with a couple jacks on center console including volume control. Just want to know if E7007/8/9 NAV will allow continued use of those functions.

Thanks Again!