Hmmm. I tried disconnecting my iPhone from Lexus CAR MULTIMEDIA (phone calls) but I didn't get any audio or Lexus mic working. Also, steering wheel controls don't work. In my case, having the iPhone connected to my Lexus CT200h Bluetooth (phone) and RT to Lexus CT200h Bluetooth audio everything works. Mic and speakers from Lexus and steering wheel controls also work with phone calls. Am I doing something wrong?
Would you mind posting the latest firmware that you received. I tried to contact Road Top but I haven't heard back yet.