I have an enduring issue on my 300CE. When I turn the sterring wheel while traveling at low speeds, I get moaning and groaning from the steering column. In recent years, I've rebuilt the steering pump and replaced the steering box, but the moans keep coming. The fluid level is constant, the filter is new, and the belt is tight.

Any suggestions about where to look/what to look at?

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1994 E500 199/Gray 82k
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