Hi! Anyone know howto replace the original roof spoiler with a S-line model? I've managed to source one S-line spoiler, but can't seem to figure out how it should be mounted. From what I can see by looking at the current spoiler, it seems to be a fixed part of the boot lid - I atleast couldn't find any obvious seams anywhere. The S-line spoiler has three mounting points for screws on the bottom side, so clearly it needs to be mounted to something - but what and how? Thanks in advance!