Plenty of Info in the search.
I've got a Leon Cupra with one hell of a rattle from the boot.
I've had a search on here and some suggestions are:
Adjusting the rubber stop on the back seats
Wrapping the catch on the back seats with tape
Some have found that theres some sort of fault with the rear suspension particularly with the R iirc
Also like you mentioned check that all the trims, spare wheel and tools in the boot are where they should be.
I've tried all these and still have the bloody rattle, mine sounds like its inside the boot lid, can i get the trim off....NO <---- Any tips appreciated!!
Not alot of help i know, some suggestions all the same.
Matt
If you go into Advanced Search, then type rattles, and make it specific to the Leon section, it will filter out , and hopefully give you loads of info.
Matylad - mine is exactly the same.
I originally had rattly rear seats - a bit of pvc tape around the metal clips (or whatever you call them) worked that out. I've emptied the boot, taken the parcel shelf off, and had the seats down to try and remove all rattle sources, but I still have the same rattle as you. Sounds like it's coming from inside the plastic shell yes? Quite a hollow sound. I too want to get that back panel off to have a look. Let me know if you've since had any luck.
Cheers
Matt
rear shock top mounts.