err right if you tke the carpet bit off the boot lid there is a plastic membrane bhind it, its that that leaks if it has been moved or anything and then leeks down the inside of the boot lid and into the boot,
the below link is basically how to fix it,
http://www.frenchcarforum.co.uk/forum/v ... 11&t=24042" onclick="window.open(this.href);return false;
and if you go to the very last post on the following thread it'll show you the membrane thing,
http://www.frenchcarforum.co.uk/forum/v ... 8&start=15" onclick="window.open(this.href);return false;
also while your there put some mastic/silsicon round the 4 screws and 2 bolts holding the bottom of the carpet thing up as well as i found on mine they leak as well,