Subscribed to Sirius today. I went through all the set up procedures and got the channels I ordered but could not get any audio. The tech advise to switch over to FM/AM to see if any audio was there and there was non. I shut the car off and the radio closed the door waited a couple of minutes. I went back in turned the car and the radio back on. I checked the FM radio and I had audio. I went back to the Satellite the Sirius channels was there but again no audio. It show I had signal. Any one can help. I have a 2013 535i Sport model.