His own name scrolled into view at the bottom of the list.

(often Ksw-Q for Android 10 or Ksw-R for Android 11) firmware specifically developed for Chinese Android head units used in BMW, Audi, Mercedes, and more. "Userdebug" simply means the software was built with debugging capabilities enabled, which is standard for these aftermarket systems. How to Update Your Firmware

Depending on your current userdebug build state, choose one path.