Thought I'd share a cool piece of hardware I discovered on an Audi A4. They're spring-loaded hooks that mount to the top of the trunk so you can hang shopping bags, etc.
I picked them up off eBay for $10 each. They come with 5mm screws and speed clips. But there isn't really any convinient way to use the speed clips, so I picked up some 5MM rivnuts and drilled 3 holes to mount. There was an existing 6mm threaded hole already in place I used for the fourth bolt.
VW/Audi Cargo Trunk Bag Hook
This photo shows them mounted in my G37 Sedan.