Guys, the Mercedes Seat will not work. Don’t use it. You can check the wiring diagram of the crossfire to confirm that there is no detector mat in the passenger seat. Using the Mercedes Seat will not disable the airbag and is super dangerous.

good news is that you can retrofit the airbag off switch including the „Airbag Off“ lamp. It’s not straight forward and I had to do lots of research, but finally got it working. Will post a howto soon.