Why is the steering wheel of my Audi A6 vibrating?

I've recently noticed that the steering wheel of my Audi A6 has started vibrating while driving, especially at high speeds. What could be causing this and how can I fix it?

One possibility could be that your wheels are out of balance. This can cause vibrations in the steering wheel. Have a mechanic check your wheel balance and rotate your tires if necessary.

Another possible cause could be worn out suspension components. This could include the shocks, bushings, or tie rods. It's best to have a mechanic inspect these components and replace any that are worn.