Maybe I'm late to finding out about this, but I was looking for the ground clearance numbers when I saw this:
https://www.bmw.ch/fr/bmw-nouvelles-...ues.html#tab-0
The updated emissions of CO2 went up from 204 [194] g/km to 227 [213] g/km. It's the same on the German configurator
I wonder why that is... (steel shaft, particulate filter, number fudging before?)
FYI, here anything above 200 g/km would get a 50% penalty on the yearly tax that you pay. I was quite happy that the M4 was below that line.