Hi Guys, I'm excited to say I have ordered an Intravee II kit from
ToysInYourCar.com - Home and I will report back when it arrives.
It clearly seems to be the best kit for iPod integration for the old 16:9 E53 Nav/Entertainment systems.
I'm amazed at how many other 'cool' things it can do for the car like closing the windows, sunroof and mirrors with only one button push and not having to hold the button down!