How do I troubleshoot a fault in my Audi A2's headlights?

My Audi A2's headlights suddenly stopped working. How can I diagnose and fix the issue?

First, check the headlight fuses and replace if necessary. Then, inspect the connections and wiring for any damage or corrosion. Finally, it could be a faulty headlight switch so consider testing or replacing that.

Make sure to also inspect the bulbs themselves. They may just need to be replaced. If that doesn't solve the issue, it could be a problem with the headlight control module or a wiring harness issue.