no lights on mirror come on, not even on star light, fuse is good, is mirror the problem?

I have a 2012 Cad STS & the OBD II light is on while I'm driving. What does that mean?

I've have the gasket around the sunroof replaced, reseated, reseated once again and the glass panels moved around a bit, all in an effort to reduce the bloody noise in my 2012 CTS! I've been told by several people that this isn't normal. On the flip side, GM Rep's are now telling me that yes - this is normal! It's like driving down the highway in a glass bubble. Any ideas?

Weather temp does get below 50 degrees. The vehicle has less than 1700 miles on it. Neither driver nor passenger seats work. Yes I know that the lights don't come on and I don't care about that. Nothing worse than getting into a warm car and sitting on a frozen leather seat! Dealer doesn't seem to think there's a problem???