Question about Mercedes-Benz S-Class

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When I first start my 2003 Mercedes S430 there is a groaning noise when I turn the steering, either way, left or right. This goes away after I drive it a few minutes. I have ben told the steering fluid may be low. Thanks!

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Power steering fluid maybe low or need to be flushed the pump could be going out,also check condition of serpentine belt and tensioner

Posted on Sep 08, 2009

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S430 2002 is making noise when steer left or right, but goes away what could it be?


If its a groaning noise and its worse when cold it might be the power steering fluid is low, as the vehicle warms up the level rises and the pump stops sucking air, check the power steering fluid first

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It sounds like your power steering pump as you said, but I would start with changing the main drive belt. I have come across this same problem before. If you change out the belt and you still have this problem, remove the belt and start the engine. Turn the wheels left and right and listen for the noise. If the noise is gone then put the belt back on and check again. If the noise comes back then you have a component problem. I have seen the belt tensioner to make noises as you describe. I hope this helps you. Let me know if this is helpful to you.

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1 Answer

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