Does anyone have the Pioneer (AVIC-N2) nav, FM, XM, CD, etc., etc., in their Noble? My M400 has one of these units, and a message keeps popping up ( something like "XM updating" or similar) when I'm trying to use the nav function. It's very annoying & makes the nav function virtually unusable. I've downloaded the manual, but I didn't find anything that covered this problem. If anyone has one of these (more advanced than I really need) units, I would welcome some input.