My Audi A5's engine has suddenly started making very loud noises, even when idle. The sound is similar to a knocking noise and seems to be coming from under the hood. It's also causing a bit of vibration. Help!
ReplyEnsure the engine oil level is correct and top up if necessary. It could potentially be an issue with the oil pump or the engine bearings, in which case you'll need to take it to a mechanic for further diagnosis.
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