would suggest a water test put hose pipe on vehicle sit in side could use tal power around area to see where coming from check the drain under suttle panel mmay have leaves blocking leaking screen door door foil hope this help dave
dave
June 2010
check membrane between trim panel and door for damage and make sure it's stuck on.
k
June 2010
I had a simialr problem with my focus - mine was really simple - the plastic facia just below the windscreen wipers had lifted slightly. Just tap it all to make sure its pushed down enough