Why does my Audi 80 engine make strange noises?

I have noticed that whenever I start my Audi 80, the engine makes a high-pitched whining noise. It goes away after a few minutes of driving but comes back when I turn off the engine and start it again. What could be causing this and how can I fix it?

It is possible that your alternator belt is loose or worn out causing it to slip and make a squealing noise. You should have it checked and replaced if necessary.