Think it's called something like Aligning the CAS. Think you need a Maxi SYS Elite with a current sub, a special BMW Ethernet cable and Team Viewer assistance from some African male model guy that sells them from his web site.LOL, Good luck
https://www.youtube.com/watch?v=z2MTbbPotwo
oops , wrong CAS, here you go
https://www.youtube.com/watch?v=7R-1K3BBSW0&t=1520s