Originally Posted by Crowz

You should be able to hook up one wire more than we had to do and everything just work. But I don't have dsp in my X5 so I cant test it for you.

We will help you as much as we can though

As for why they don't just make a plug and play? Simple, there weren't that many bmw x'5 made vs other cars and the dsp system lowered the amount made even more. From a stereo manufacturer standpoint vs market size I'm amazed how many radios there actually are to be honest.