My trunk is leaking as well, seems to have just started out of the blue. I have an old air mattress in my trunk to keep it clean as it catches all the dirt from my kids baseball & football gear, easy to wipe and vac. One day stuff was wet, figured a water bottle leaked. Then after a recent big rain stuff was soaked... oh boy! So, I opened the little ski door hatch on my back seat, got the flashlight out, poked my head thru the hole and then had my son shower water on various spots on the trunk. Spoiler was ruled out so we moved up towards the window area and yeap water came running into the trunk on the right side only and it almost looked as if coming in from an electric wire harness but that’s because the water was following path of least resistance. I then had him shower water only on the seam between the window and trunk and sure enough water was coming in which means my weather stripping is not holding up for some reason.
I'm not sure what to do, I could try to run a light bead of silicon down on the edge of weather strip but fear this will leave high/low spots and more water will come in. I read somewhere that I can try to adjust the trunk lid height so tonight I’ll see if this is possible. I know the compression lid shocks are shot so maybe with the trunk getting slammed hard sometimes things are out of alignment.
