Help.... I'm trying to connect my standalone Sirius XM radio to my Model S without using the terrible FM modulator. Step 1 ..I've tried plugging in a bluetooth transmitter to my sirius XM via AUX but I discovered that the Tesla does not recognize A2DP protocol, so no bluetooth connection. Step 2.. I know the Tesla recognizes USB flash drives, so I have a bluetooth USB adapter to receive my A2DP signal. No luck as the Tesla did not recognize the USB input Step 3.. used a USB to AUX adapter ... No luck either the Tesla did not recognize the USB input . Other than telling me to pay for the upgraded sound system and cut out my glass roof and install the panoramic roof and install a Sirius XM radio, how else can I connect an auxiliary power cord to the Tesla?