Has anyone had this problem? I have a new 2005 TL with Nav system. Every few days the satellite radio loses all its presets for an hour or so. All the on-screen "buttons" and mechanical buttons default to XMs Channel 1 and the on-screen buttons all show the number 1 instead of the channel I set. After a few minutes to a couple of hours, the presets are restored; usually after I have turned the ignition off though this doesn't always fix the problem. I am not disconnecting the battery and the AM and FM presets don't do this. I have had it back once to the dealer, when it was working fine of course, and they found nothing wrong. They rebooted the radio (or so they said) but this didn't fix the problem. Any ideas? Apparently no-one has heard of this problem. I'm frustrated and thinking of demanding they just replace the whole unit.
Thanks