California's long dry spell is over (although we're still in drought: reservoirs are still very low), and we've got a problem we didn't know we had in our S80, which we've owned now for two years. We're getting serious levels of water in the car when it rains. It's showing up in the right rear footwell, although we park on a slanted driveway, so it could be coming in anywhere on the right side.

I didn't see evidence of leaks around the door seals (the doors shut properly), and, no, the windows aren't open, nor is the sunroof. We cleaned out the channel between back window and trunk seal, to no effect; the trunk is staying dry anyway.

I know the only reliable test is to run water on it and sit inside looking for the drip; but any suggestions will be appreciated.