Yes the clips usually break as you get the scuttle cover off, best to arm yourself with a set of replacement clips from BMW if you are doing this job.
https://www.realoem.com/bmw/enUS/showparts?id=BT32-EUR-07-2003-E85-BMW-Z4_25i&diagId=51_4961
Items 28, 2 and 6 are the clips and rivit fittings used on the cover.
https://www.realoem.com/bmw/enUS/showparts?id=BT32-EUR-07-2003-E85-BMW-Z4_25i&diagId=51_4961
Items 28, 2 and 6 are the clips and rivit fittings used on the cover.