If your glass tailgate rattles as you drive along, there is a cheap but effective fix you can do.

Open the tailgate and clean up the latch with degreaser.

Cut a section of PVC tape about 1cm wide an 2cm long. Wrap it around the latch.

Smooth the tape down and close the boot. If it doesn't close, then you need to cut back a little bit of the tape. The annoying rattle should now be fixed.