[domerX1]

This looks like an old thread, but I thought I'd add some info in case anyone stumbles on to it. I have the front sunroof drains clogged. Apparently, this is a really common issue. The front drain apparently comes out behind the inner liner in the front wheel well. You have to pull the inner fender skirt and manually clean the clogged lines. Some people say they cleaned it with air. Others say don't try. I know that there are drain connections in the A-pillar because when I troubleshoot and fill the clogged front lines, water came out of the A-pillar. There are drains from the back of the sunroof as well. Those come out of the top between the top of the rear hatch seal and the body, next to the hinges. Those are easy to check by fishing a piece of string trimmer line through (you can't fish the front because BMW has a couple of 90-degree bends in the line (great design) in the front footwell. My issue is that I park my car front down and the rain fills up the front drains. Then the water spills out the side of the sunroof tray, goes down the c-pillar, and fills the pooka in the right rear that holds the control units for the PDC, Camera, and keyless start/entry. Although it sounds like you may have a different mode of entry or draining than me, if I were you I'd pull the right rear plastic holder in the trunk ad check that water isn't building up in that area, too.