Ok...before I spend $549 let me be sure I know what I'm getting.

1) This tuner will allow my XMDirect receiver to work with my navigation, CD Changer, Ipod, and DSP...right? Remember, I have the Ipod already hooked up through to Aux. Will the XM channels, song title, etc. all show up on the Nav screen?

2) Where is this piece physically located in the X5?