My ā23 BD sometimes lost sound from rear speakers. Turned on off and/or did the push in on/off and fast forward buttons and it fixed itself. Happened a few times. Electronic stuff gets confused at times-like us- and needs a reboot-kick in the butt or rest, line us-to fix itself. Enjoy the 90% +...
I would consider that too for the seats but then you still have the various blue highlights in the cabin-side door panels, dashboard, arm rest, center console.