Why are my headlights dimming in my Audi A2?

I noticed that my headlights are dimming and it's making it difficult to see at night. What could be causing this issue in my Audi A2 and how can I fix it?

It's possible that your battery is low and needs to be replaced. Check the voltage and if it's below 12 volts, replace the battery.

Another potential cause could be a faulty alternator. Have a mechanic check the alternator's output and replace if necessary.

It could also be an issue with your headlights themselves. Check the bulbs and replace if needed.