Dealer informed me today that the parts for the mirror haven't been released yet and they don't want to install an 05' mirror because they aren't sure if it's still the same. So there aren't any 2006 models with the AD mirror yet? Sounds kinda strange. I told him I would wait for it to come in, he said anywhere from 2 weeks to 2 months.

just buy and install you own with better options.
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=78;t=001054#000000