Apparently, the manual says you plug the connector into the plug in the glove box. There is a plug in the glove box with nothing connected to it right now. Apparently, this cable plugs into it and then the other end is the standard ipod connector. I have been able to find very little info about this setup though. So, yes it should basically have an ipod docking station in the glove box. It should allow full control of the ipod at the head unit and charge the ipod.
That first one you listed has the cable I need but I don't need the other part. I only need the part with the ipod connector. I certainly don't want to spend 90 for a cable either. I haven't been able to find those cables separated out though. Was hoping someone knows if there is one.