Under the panoramic roof there is a tray to catch the water and then drains to drain the water out. When your car is parked on a hill of any kind the water obviously moves towards the rear of the car. Unfortunately the drains don't drain quick enough so the water goes over the top of the tray and ends up leaking into the cabin. Toyota had an engineer come out to the dealership and they state there is no fix to the problem at this point. Supposedly Toyota Corporate will be calling me to discuss my options of them purchasing back my vehicle. I love this car, why can't they find a fix??