Why is my Audi A6 making a strange noise when I accelerate?

I noticed that my Audi A6 is making a strange noise when I accelerate. It sounds like a whining or grinding noise. What could be causing this and how can I fix it?

Hi Emma, the strange noise you're hearing could be due to a worn out serpentine belt or a malfunctioning tensioner. It's important to get this checked and replaced if necessary, as driving with a faulty belt can cause damage to other engine components.