So, the first half of the year with my new 2015 Summit the radio bass would disappear totally with no control at all on the equalizer page. It would remain that way until the car was shut off and sat a couple a minutes then restarted. The dealer always stated they had to see it before they can fix it. This happened at least ten times during the first six months of ownership. It does not occur while driving, only after starting the car. Finally it happened after starting while I was next to the dealer so I pulled right in. They said there was a code for "loss of power to radio" Apparently the "code" is only present during the fault and does not store. So they put in a new radio now two months later, the same issue. No bass just a tinny sound. Obviously the woofer is not operating intermittently. The old radio was "flashed" about three times with no help. The new radio was supposedly "flashed" after installation too.