I have the stereo with the 8.4 display and when you turn up the volume over 20 it's like somebody has the volume knob in there hand turning it up-down,up-down constantly , very irritating . Most noticeable when listening to a CD , or iPod/iPhone , doesn't matter if its plugged in with aux.,USB, or streaming in Bluetooth. It's been to the dealer 3 times for this , first time they told my wife it's operator err, 2nd time I showed the service manager myself, 3rd trip , new radio installed , same problem. Is anybody else having this issue or is it just me? Can anybody try it out on their radio, really noticeable on 24 and up, it starts at 19.