After searching, it appears xan is for blind spot and cross path detection, which I found on a mopar site. The imu is a guess based on checking multiple sites- it would seem to be for collision avoidance, and may stand for inertial measurement unit. You actually should contact a mopar dealer to get a more definitive answer, and not order based on my guesses. I know from reading various posts here that some Renegades have blind sot and cross path detection, and/or collision avoidance. Good luck with your order.