Hi, since your car has the heating circuits, could you do me a favor and measure the voltage of the black wire of the heating connector in the wheel (which is connected to the yellow wire coming from the car)

- with engine and heating off,
- with engine on and heating off,
- engine and heating on?

You can measure it against the brown (=white coming from car) wire, which is ground (GND).

Thanks,
Thomas

PS: I see your wheel has no "M" key, so it's not for an M... what part number is that? Is this a wheel for the X6?