have A 2004 S430 4matic It has Noisy Engine Like Knock Sound
Is That Common For This Car?
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2004 Mercedes-Benz S430 4MATIC Question: 2004 s430 4matic noisy engine Help?
Answer #1overbys from Overbys Inc, February 10, 2011, 06:03Master
engine knocking is not common and almost always indicates
something wrong. find an MB specialty repair shop ASAP.
Answer #2Visitor, March 27, 2011, 20:24
I had a MB430 and the same problem. I lucked out as it was just the serpentine belt tensioner taking a dive. Good Luck!