i haven't read every page in this thread but i haven't seen an issue that happens occasionally since we first got the car. Sometimes the entire volume is muted in car where no media audio will sound, nor calls, nor turn signals or warnings. Visually this appear normal but no sound. This will usually maintain until the car is locked and allowed to reset itself. It happened one leg of a road trip and allowed me to get very familiar with cabin, road, motor noises; all of which are pleasingly minimal!