What causes the strange engine noise in my Audi R8?

I've noticed a strange knocking sound coming from my Audi R8's engine. It only seems to happen when the car is idling. What could be causing this noise and is it something I need to be worried about?

It's likely that your engine is suffering from a problem called 'piston slap'. This occurs when the pistons start making a knocking noise against the cylinder walls. This can be caused by several factors including excessive engine wear and poor lubrication. It's important to get this checked by a mechanic as soon as possible.