Three weeks ago I purchased a CPO 2010 TSX Tech and since then I've been researching how to change groups on DVD-A discs. I've found instructions for earlier and newer cars but not mine. After contacting Panasonic Automotive Systems who makes the ELS audios sytem directly, I think I have an answer. Unfortunately, I'm away on business and was hoping someone can verify for me. I was told to "press and hold both CATEGORY and SCAN buttons for more than 5 seconds". Can someone try it and let me know if this works? If not, I can contact them again.
Greatly appreciate your help!

 

This works for me on my 2010 tech. Enjoy!