Q: 2004 s430 4matic noisy engine Help? on 2004 Mercedes-Benz S430 4MATIC

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have A 2004 S430 4matic It has Noisy Engine Like Knock Sound
Is That Common For This Car?
(2) Answers
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engine knocking is not common and almost always indicates
something wrong. find an MB specialty repair shop ASAP.
I had a MB430 and the same problem. I lucked out as it was just the serpentine belt tensioner taking a dive. Good Luck!
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