Hey ... I've been killing myself searching Google/Ask.com/These forums trying to find this information and I'm at the end of my ropes here.

I have a 2003 ML 350 with (I believe) a BOSE stereo system. I do not have a navigation system installed, but do have a CD changer installed.

What I want to know is what kind of input connection cables are in the back. When I pull out the unit, I understand one cable coming in is for the power, one is for the radio antenna, one cable is for the CD changer. There is however an empty space for what I believe would be the navigation system.

Does anyone know what kind of input "ports" those are (model numbers, etc).

Thanks in advance.