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Why is the engine making a knocking sound?

I have noticed a knocking sound coming from my Audi A8's engine. What could be the cause of this and how can it be resolved?

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The knocking sound could be caused by a variety of issues, such as worn out engine bearings or a faulty valve. It is best to take your car to a certified mechanic for a full inspection to determine the exact cause and find a proper solution.

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As a fellow Audi A8 owner, I have experienced this issue before. In my case, it turned out to be a faulty spark plug that needed to be replaced. I would recommend checking all of the spark plugs and replacing any that show signs of wear and tear.

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