If you are looking for CAN controlled transmissions, see below
•BMW DCT transmission control.
Note: All of the above requires MaxxECU PRO.
Gear selector = stick position from transmission (not from the actual shifter).
Note: Engine must at least be idling for the transmission to work properly.
•https://ofgear.dk/userguide/maxxecu-support.html - NAG1 / 722.6 auto transmission controller, https://en.wikipedia.org/wiki/Mercedes-Benz_5G-Tronic_transmission,