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

have A 2004 S430 4matic It has Noisy Engine Like Knock Sound
Is That Common For This Car?

Asked by for the 2004 Mercedes-Benz S430 4MATIC
engine knocking is not common and almost always indicates
something wrong. find an MB specialty repair shop ASAP.
1 more answer
I had a MB430 and the same problem. I lucked out as it was just the serpentine belt tensioner taking a dive. Good Luck!