Why does my Audi A4 shake when I hit high speeds?

I've noticed that at high speeds (around 70+ mph) my Audi A4 begins to shake and vibrate, making it quite uncomfortable to drive. Any ideas on what could be causing this and how to fix it?

It's likely that your wheels are out of alignment, causing the vibrations at high speeds. I would recommend taking your car to a trusted mechanic or dealership to have the alignment checked and adjusted.

Another possibility could be worn or unbalanced tires. I would suggest getting a tire rotation and balance done to see if that solves the issue.