BMW M3 Rear Window Seals
Recommend NOT replacing the lower rear window seal, since it is glued in place and rarely wears. You can use black silicone as the adhesive for the lower trim. Large trim piece is just pushed into place without any adhesive. Use a lubricating liquid/soap to make it easier to press in with a trim tool.
Use Goo Gone to clean the lower trim slot. The side seal pieces overlap with the lower piece ends to keep them in place
BMW M3 Front Windshield
NOTE: E92/93 vs E90 M3 front windshield seals are different.
Cheers