I installed the DICE kit in my X5 non-nav non-dsp. I am very happy with it. I routed the cord to plug in my ipod into the ashtray. I bought the radio interface instead of the trunk interface. With this kit i pulled the radio out and put the DICE harness directly into the back of the radio. I did not have to route a wire from the back of the car to the front. One thing to note: my car has bluetooth hand free. When i put the new harness into the back of the radio two pins had to be moved from the back of the radio into the new harness to maintain the hands free system. Plugs 6 and 12 are for the hands free audio through the speakers. This is the only thing to keep in mind if you use the radio interface. It is not difficult to switch out but i didnt know ahead of time and had to take the radio face out a second time. DICE is nice. It gives you all the functionality you could ever want and it charges your ipod, iphone etc... I was debating between aux or dice and decided on dice because it charges.