Why does my Audi A3's steering wheel vibrate at high speeds?

I've noticed that when I drive my Audi A3 on the highway at speeds over 70 mph, the steering wheel starts to vibrate. What could be causing this and how can I fix it?

It is likely that your wheels are out of balance, which can cause vibration in the steering wheel at high speeds. It is recommended to have your wheels balanced by a professional mechanic to fix this issue.

Another possibility is that your tires are worn unevenly, causing the vibration. Make sure to regularly rotate your tires and replace them when necessary.