Each stage of Dinan depletes your bank account in an exponentially greater amount in exchange for shiny bits that may or may not have a net positive effect on your X5.

__________________
Kirk
Las Vegas
2016 X5 40e Mineral White/Black Dakota Leather, ZLL, ZCW, ZDA, ZDB, ZPP, multi contour seats, rear side window shades, HK stereo
2011 E90M3, 6-speed manual