Ok, so tried to swap the steering wheel buttons with 1EA 959 442 B (similar as above, but no R button). ...but went back to the original for the ACC to work again.
Pros
1) I liked the volume control on the left
2) I loooooved the heated steering wheel button that even controlled the steering wheel heating (but it did not activate the AC view on the display to show the "level" of heating, this might be coded/adapted)
Cons
A) The ACC would need to be re-activated... I did not research how to do it or if the whole ACC adaptation needs to be performed (dealer)
B) The View button had no function as expected
C) The track change buttons worked as "view" buttons on the original button set
D) The left/right arrows did not have any function
...there could be some profile/adaptation to address the C and D challenges above, but since the new SW 3.1 is optimized for the original ID buttons I went back to the original button set. Well at least a fun to try. And yes the ACC activated immediately after installing the original buttons (yes, this was close).
Below are the inside photos of the left button set. It's incredibly WELL made and rather complex - two microcontrollers on the board - one probably handles communication and the other handles the touch - but pure speculation...
The PCB folded out from the touch portion (white) part. Notice the LEDs on the board that light-up individual buttons and the three round metal pads that sit on the green silicone pads in the opposite white part. This makes the haptic feedback so good (allows both parts to move slightly, so the vibration is isolated). The vibration motor is in a grey silicone enclosure in the white part, so it swings right below our thumbs...
The same PCB folded over...
