I've received a couple of PMs on this, If I can be more clear, The OEM NAV unit that comes on the XF is a Becker TrafficPro unit, and Phatbox makes a unit for the TrafficPro. In fact all the phatboxes are the same, the only difference is the connector to the head unit, and the software to recognize a supported OEM radio. They do have some aftermarket radio support as well. The OEM support is growing. At this time I believe it's, VW, Audi, Volvo, Jaguar, Toyota, Ford, and TrafficPro. Check out their site if you want to look further into aftermarket model support.

I apologize for the double thread.

http://www.phatnoise.com/