How can I fix my Audi A4's faulty taillights?

I've been having trouble with my taillights on my Audi A4, they keep flickering and sometimes don't turn on at all. Any tips or tricks to fix this issue before taking it to a mechanic?

First, try checking the fuse box in the trunk as it could be a simple fuse replacement that solves the issue. If that doesn't work, double check all the wiring connections and clean any debris that could be causing a blockage.