About three months ago I noted a knocking sound coming from the front suspension area, toward the left side. Lower ball joints are ok, replaced upper control arms, tie rod ends, brake control rod bushings, shocks, steering shock. Still the noise. It makes the front end feel sort of loose, and is especially noticeable driving slow over bumps. Tonight I tracked the noise down to the steering box. When my daughter ran the steering wheel side to side rapidly, short throw, while the car was jacked up with me underneath it, I can go right to the noise, and it's the box. I notice an adjuster bolt on top of it, right where I can't get a wrench conveniently, for adjustment. Would adjusting it take that condition out of it, or should I get another steering box? Has anyone had this problem?

Advice, please?

Dave

If you are a DIY like alot of us here you may find some helpful information in the "DIY Links by Parts Catagory" section.
From the home page of MercedesShop.com arrow down a bit until you see the section I just mentioned above. Then arrow down and click on Steering. There is a section describing steering box clunk. And another one about the adjustment nut. Also check the link about steering coupler.

I am pretty much a novice myself. But with the help of the guys here, some providing step by step pictures, I was able to change my own steering box.

If you decide to do this and have the tools to do it, I recommend ToolSource.com for the proper Pitman Arm puller. *************** (Rusty's) for a new steering coupling. ************** for the most reasonable prices on powersteering hoses and powersteering filter,and most importantly, CarSteering.com for the rebuilt steeringbox.
I found them on Ebay and got the box for $299. Otherwise from their website the box is $329. (The rebuilt box comes already centered) There was a refundable $150 core deposit that was added to the price, and I added $12.00 for a prepaid return label.
The box will be mailed to your door (free ship) and you have 90 days to return the rebuildable core.Good luck

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