Why is my Audi A6 engine making a weird knocking noise?

I noticed that my Audi A6's engine has been making a strange knocking noise recently. Should I be concerned? What could be causing this?

It's possible that the knocking noise is due to a problem with the engine's combustion process. Have you noticed any changes in your car's performance or fuel efficiency?

Another possible cause could be worn out engine bearings. If this is the case, it's important to have them replaced as soon as possible to prevent further damage.

I would recommend taking your car to a certified Audi mechanic to have it checked out. They will be able to accurately diagnose the issue and provide the necessary repairs.