On my e36, the sunroof drain hose popped off and there was a puddle at the bottom of the passenger side A-pillar.... could be that!
1992 BMW 325i (CHUMPCAR #296 - build in progress)
1992 3.0L M52 325i (ex-daily driver - track car only)
2002 330Ci (ex-daily driver - sold!)
Check out my e36 track car build