Why does my Audi A6's steering wheel vibrate at high speeds?

Every time I drive my Audi A6 at speeds above 70 mph, I notice a slight vibration in the steering wheel. It doesn't seem to affect my ability to control the car, but it's definitely noticeable. Any idea what could be causing this?

Your car may have unbalanced or worn tires, causing the vibration at high speeds. It's important to have them checked and rotated regularly to maintain a smooth and safe drive.