As Clio_novice has said, it real real common on nearly all Mk1 Clios. I got the sunroof seal sorted, but the main leak was comming in from under the sunroof to car roof seal. Its not too tricky to take the whole thing out. Start at the rear tilt handle then take the black rubber seal off (all the way round). Then just remove all 24 (!) bolts to pop it out. I siliconed all the way round..problem all sorted, no leaks... Nothin in the haynes manual, but you can work it out as you go along.. Enjoy.