Dom,
Welcome to the circle of 560SL owners!
My trunk has no liner on the lid, just a really good, thick trunk seal. Good solid sound when closed.
Could you have a loose hinge?
You may know about
www.************************/ ? They have a free catalog for SL/SLC's that features exploded views of your car showing about every part and its name. Good for reference when doing comparison shopping. And do not forget PartsShop at this site for help in finding parts numbers and competitive pricing -- buying from them helps keep this site going!!!
I have no problem getting parts for my cars from the dealer, independents, nor the internet, including PartsShop. Unlike network system components, MB's aren't obsolete after a mere quarter century.
Roger
'86 560SL
'75 240D