I did about 10 minutes of driving in heavy rain yesterday in my '11 MCS and wound up with a puddle of water in the boot. I can't quite trace where it's coming from. The removable floor piece is soaked, but not any higher up than that. It seems like it might be coming from the rear plastic area with the vents. It doesn't collect water when sitting in the rain, you have to be driving it. Any ideas?