"Thanks for the responses. Does the funny looking antenna on the '06 work with XM or will I have to install another?"
If you are talking about the short stick on the front of the roof, you are talking about the AM/FM antenna and you will have to install another antenna.
You can order the antenna from the same dealer that supplies the Tuner.
The antenna can be mounted on the rear of the top OR it can be mounted IN the rear hatch near the top (behind the inspection cover). The hatch is made out of plastic and will still allow good operation.
Just depends on whether you want stealth or you want to say "hey everybody, I have Satellite!".
Alan is right.
Start by getting a new dealer.
The Murano has some complex things.
The Sat Radio ain't one of them.
Homer