stereo help

hi everyone i was wondering if someone could help me out. i have a 2013 octavia vrs esstate. the problem is that the car sterero sometimes changes station on it own. also when i press the mode button to change from radio to cd and so on i dont have a selection for cd anymore. the other day wife drove the car and the stereo would no turn on i told her to hold the volume button for 10s then it came back on. as it is out of warenty is there a way to fix this problem. i keep getting the fornt left light is out when the lights come on but the light is not out it working. is the car due a update. hope this makes sense. thanks