Windshield removal clip questions …

[JOEBMW]

those are for the rear glass, not needed from front glass.

[Ertech]

Hi guys I need to remove the windshield and will order a new molding for it
I the part diagram I see 2 clips pn https://www.ecstuning.com/b-genuine-...t/51311948155/
and

https://www.ecstuning.com/Search/SiteSearch/51%C2%A031%C2%A08%C2%A0177%C2%A0850/

do i need these both if so how many of each
thanks
pn 51 31 1 948 155
And
51 31 8 177 850