Hello guys, at my Ultra-Classic 2013 I have a problem at the radio system. Mostly the system remains silent after switching on the ignition, although the radio is switched on. Also, there is nothing to hear about the CD drive. Every now and then, however, it goes on with the ignition and then after a few minutes to go back into the mute motus. In my opinion, I exclude a wackler. Who can give a possible explanation here.