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Why does my Audi A1's engine produce a knocking noise?

I've noticed my Audi A1's engine occasionally makes a knocking noise while idling. It goes away when I accelerate. What could be causing this and is there anything I can do to fix it?

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The most common reason for a knocking noise in an Audi A1's engine is low oil levels. Make sure to regularly check and top up your oil to prevent engine damage.

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