How to troubleshoot Audi A8's steering wheel vibration?

I've noticed a vibration in my Audi A8's steering wheel while driving at highway speeds. What could be causing this and how can I fix it?

First, make sure your tires are properly inflated and balanced. If that doesn't solve the issue, it could be a problem with your suspension. Take it to a trusted mechanic for further diagnosis.

Check your wheel bearings and make sure they are properly lubricated. If the issue persists, it may be due to uneven tire wear or a misaligned front end. Have a professional inspect your vehicle to determine the cause.