My screen is 12.1'' with Android 11 for XK. I've some questions about its features:
1. The Steer Wheel sound volume controls are in reverse: V+ will reduce while V- will increase it. Is there a way to fix it? The screen has Steer Wheel Settings: how to use them? Pushing buttons there seems do no effect.
2. Are there any firmware updates? If yes, from where to get them?

 

Yes in settings somewhere you can reverse the steering wheel volume but I don't recall where. You're just going to have to go through all of them to find it but it is there.

Steering wheel settings does nothing

No firmware updates available

 

Thank you, Sean!
It is a Reversal Volume switch in the Technical settings