Good luck as you "control your ipod while driving" lets hope none of us fellow owners are around when you take your eyes off the road to look at it.

As for your quest, I hope you do find something, but a little hint, its data not voltage that triggers the input. And the control is software driven not hardware, which makes this unit special compared to "our" other Becker units.

And no it is not demand that is keeping the aux companies from moving foward, it is that there is no upside to doing it, not enough systems sold and no long term plans to continue or use that head unit in other vehicles.

If you are the "code writing and engineering type" search the forums in Germany for the becker CD changer and you will find some people over there that will provide you the code to build an interface.

Good luck in your investigation.