I have read all off your comments. Damn i have the same problems. Turning on and off when the car is closed and volume goes on mute. I have made the disconnection that @omeromeryigit supposed and for now it is oke. Volume is on the steeringwheel. For now no powerbuttun or volumebar/slider But the dealer keeps me waiting and waiting so i orderded a Hardware version H49 from a 2024 Octavia and i am going to put that one in. Hope this week to recieve it. Paid a 400 euros but it is worth it. On RRR.lt are more to find. Hope if you need one you will able to find one. They are rare and hard to find. the older crappy versions are plenty. Thanks to all off you for sharing there problems story's and solutions.