Touchscreen, iDrive retrofit for E53?

[TerminatorX5]

the "iDrive" for the E53 is operating on the same principle as the iDrive for the iDrive cars: if you remember, the right knob on the monitor (i am not so sure about non-monitor cars, with or without navigation) has three vectors of operation - clockwise turning, counterclockwise turning and pressing in. those movements translate to whatever signals that the knob is sending down the I-Bus. So, if you can replicate those signals, even a door knob will do. The "iDrive for E53" is precisely that, the right turn knob installed remotely in the center console. Of course, it looks better than a door knob would have been... lol... And it also has couple additional buttons... So, the menu on the screen is still the same menu that you have had all along. It is just the right knob that you used to reach out to get, now is under your arm... you just would need to splice into iBus and power to feed the LEDs used to light it up.

I still think that 350 Euros for that thing is too much but i suspect that part of due to the cost of the original BMW parts used to build it.