I just have my X920BT in my 2010 mazdaspeed3. I have it bypassed but one thing I realized after the installation is that the X920BT won't auto adjust the audio volume by speed. So I have to turn up and down the volume while driving and stopping. Is the X920BT missing that feature?

Thanks,

Steve

nobody knows about this?

to my knowledge, no pioneer product has that feature. it's still patented i believe