Thanks for the reply. I know its that window seal because the door-panel-carpet-underneath-beside-speaker is wet. Upon pulling the speaker housing cone, I noticed the dirt path left by the water. I then (with the panel off) poured water on the glass and watched the water dribble inside the door.
When you say "drop the window down", does that mean remove the glass from the door. And "from inside" I am unclear as to that instruction. Thanks, Eike from Vancouver, BC.