Sport Package.......... as I understand it. Never heard it referred to as AG though.
Congrats on the new purchase. Aslo check out www.x5world.com
. Best X5 resource on the internet. Not many X5 people here.
Current : 2013 Mini Countryman JCW, 2007 Z4M Roadster
Past: '88 E30 M3, '69 BMW 2002 Ti, 2000 328i, Audi A6 TT, BMW X5 3.0i , Audi A4, Mini Cooper Clubman S 1.8T