Bluetooth worked fine for both phone service and media playback including YouTube and other music App, but a few weeks ago I started to notice only the phone service aspect works. The car plays back text messages, phone calls and voice-mail without any issue, but won't play any media audio through the speakers. I intentionally reset the AVM from the DCU Self-diagnosis menu just to pay for the dealership to reprogram it again but still won't play audio. No error codes found after multiple scans. I have also deleted all paired phones and re-paired different android and Apple phone models but still no luck. Anybody with knowledge or experience in troubleshooting will be greatly appreciated.