Hi guys, I've got a similar issue.
I've got a 19 plate Audi A6 Avant s-line. The plastic guide that the sliding boot cover sits and moves up and down in has broken. However, the sliding cover still works fine although doesn't close 100% as this plastic part is broken.
Can this part be bought and reasonably easily fitted or do I need to stomach the cost for a local dealer to sort this out for me?