Is IT DrY?
Leaking seals can allow water into the luggage area, so check for damp. Look for rot around the rear spoiler’s central support because that can also be a source of water ingress, and remove the boot’s side trim panels to check the inner wings and seams. One thing worth bearing in mind before taking on a project is the scarcity of replacement panels and exterior trim, so you’ll be relying on secondhand bits. Make sure the pop-up headlamps work and check the rear light lenses for cracks.