The v odd thing for me, is that it appears to have happened very suddenly... the car went from dry to wet inside what feels like almost overnight...
Just to share with you... I ran a bead of silicone across the join line and also pumped a small amount into the gap (the one in the circle above) but it hasn't prevented the water from coming in...
Obviously the weather is pretty hopeless so feel like I'm going to have to run with it until spring/early summer and then strip it down further...
@Eddypeck - I could imagine we are sharing the same issue. I am tempted to pump a small amount of silicone up into the gap to see if that fully solves the leak, and then at least I know where it is coming from. I feel like I have the exact same issue on the passenger side.
@Eddypeck - did sealing up the ECU cover 100% solve your leak? I seem to have a leak from the area circled in yellow, but can't see how water is getting in from that location? is that even possible? I ask because my ECU appears to be pretty dry aside from some condensation...