Yes the sunroof needs a seal but in the sun roof are drainage gutters if these are blocked it can drip into the car. open the sun roof and you can see the two holes at the front. the two rears are slightly more concealed. by the door hinges you can see the exit of the drainage tubes which look like a snipped piece of rubber tube, clean these as mine were stuffed with mud and grit then flush with boiling water by pouring it into the sunroof gutters. the rear drainage tubes are hidden under the bumper behind the wheel so i just left the water to hopefully clear them. you should notice that on all 4 corners water should drip out at the same speed. also get your carpets up as the sound deadining while rot and rust your floor!
Adam
