Why is my Audi producing a strange noise when I accelerate?

I have an Audi A4, and recently it has started making a strange noise whenever I accelerate. It sounds like a grinding or rattling sound. What could be causing this issue and how can I fix it?

It is possible that your car's exhaust system is malfunctioning, causing the strange noise. I recommend taking your Audi to a certified mechanic for an inspection and potential repairs.

Another potential cause could be a problem with the engine belts or pulleys. I suggest checking the condition of these components and replacing them if necessary to prevent further damage to the engine.