Just got back from my dealer and they did not have a solution for adjusting my bluetooth volume. It seems the volume can only be adjusted once a call is made. So if you are driving and you press any of the bluetooth buttons before a call is made the car voice can hardly be heard, forget it if the air is on or the window is open. I have a non GPS display and needless to say disappointed. I did request that the dealer try to get some more info from Lexus Corporate and will just have to wait till see if there might be some fix.