[Jdwoodhou]

Rick, I had very similar symptoms which appeared to be the same seam. The cure consisted of:

1:Rotating the bump stops on the boot lid inwards half a turn;
2: Removing the seal around the boot opening, cleaning out all the old sealant and smearing silicone sealant around the lip before replacing the seal; pushing it down really hard over the lip and tapping with a rubber mallet to force it down onto the metal
3: Smearing more sealant under the edge of the seal and wiping off the excess

No. 1 stopped most of the leak and No.2 seems to be a complete cure following last week's heavy rain but will know for sure when this week's snow melts as I have deliberately let it pile up on the bootlid as a test.

I expect you have done all or most of this already...