If you are going to want to successfully install your luggage rack, you need everything on this page:
http://www.bmwmcchattanooga.com/showAssembly.aspx?ukey_assembly=1187696&ukey_make=398&ukey_model=16044&modelYear=2013&ukey_category=17956&ukey_driveLine=129&ukey_trimLevel=20466
$248.44, if...