Will it work?

The icelink is hooked up using the factory CD Changer wiring. Does the factory Sirius box use the same input OR is there a different connection in the rear hatch for the Sirius box?

 

The OEM SIRIUS receiver has a passthrough connection, which allows you to still connect the CD changer (or a CD changer replacement such as the IceLink). The one limitation that still applies regardless of whether you have OEM SIRIUS or not... you can't have the CD changer and the IceLink, because they are both "ends" of the cable.

In short, yes it will work. You may need to buy an extra "extension" cable or two from MINI - the SIRIUS install docs list the part numbers. One is only needed if you have the H/K, to move the SIRIUS receiver to the other side. The other cable is if you want to use the CD changer (or IceLink, by extension).