How do I diagnose and fix vibration issues in my Audi 80?

I've noticed some unusual vibrations while driving my Audi 80, especially at high speeds. It's not severe, but it's enough to be a concern. What could be causing the vibrations and how can I fix them?

First, check your tires and make sure they are properly inflated and not worn out. Often, uneven tire wear can cause vibrations. If that doesn't fix the issue, have your suspension and steering components checked for any wear or damage. Don't forget to also check your engine and transmission mountings.