Hi all, I posted a thread earlier and I thought it was the wheel bearing on my 2000 S430, but I checked both front bearings and they were tight... I had new tires, had all the tires balanced, but I still have a little bit of vibrations at speed over 60mph.

There are 2 lower control arm and 1 upper control arm on the W220, does anyone knows which one fails most often? I looked at the bushings on both of the lower control arms, they looked ok to me and they are not torn or deteriorated... any idea anyone?

I don't know a whole lot about suspensions ( anything for that matter ), but it is really tough to isolate a single bearing or bushing - if they don't show obvious signs of damage, movement beyond spec or simply too much mileage.

But since the new tires and balance seemed to cure the intensity of the vibration, maybe that is still wear the vibration is coming from.

remember the old test - vibration in steering wheel front suspsension, vibration in seat of pants rear suspension

I had a vibration between 60 and 75 MPH. Always meant to have the tires balanced. Bought the MB (1984 500 SEC) 6 months ago. Going through it as time allows. Used this forum to learn how to replace the steering box because of an annoying leak. Just completed the process and discovered on my test run down the freeway......no vibration. Apparently over the years (I have 230,000 miles and counting) worn parts in the box would let the wheels wander.) But now very smooth ride. There is also a thread in this forum in the DIY section under "steering" on how to adjust the slop (freeplay). It involves the use of an allen wrench and a closed end wrench to make the adjustment. If this is all you need to do read the thread carefully. The information tells you which way to turn the adjustment screw for tightening. Good luck.

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