Any one have trouble with their XM Radio? On three occasions, the XM radio has messed up. It is like someone is taking the volume and turning it all the way down and then back up to selected volume. This happens continuously, in about 1 second intervals. I shut it off and made no difference. The next day, it worked fine. This has happened three times. One day it just did not work at all. Now it is working fine. I called XM, and they reset it but told me it is likely the radio. Right now it is working again. We are on a free trial until July. Anyone experience this? 2012 Limited with NAV, 1000 miles on the odometer. :facepalm: