It looks like there are 2 incentives available currently for the X3: a $455 Option Credit (for the power tailgate) plus a $500 Credit (the MI credit?).
2012 X3 xdrive35i
Deep Sea Blue/Mojave/Fineline Sienna, Premium, SAP, DHP, Cold Weather I&II, Technology, Premium Audio, BMW Apps
Previous BMWs: 2000 528i, 2003 540i, 2007 335i Sedan, 2009 335i Sedan