1998 Mercedes Benz S420

Tires and Wheels problem
1998 Mercedes Benz S420 V8 Two Wheel Drive Automatic 200000 miles

My car vibrates in the 50 mph range. I found it to be annoying about 9 months ago and assumed it was the tires. I replaced the tires and still have the same problem. It happens whether I coast or accellerate so it doesn't seem to have anything to do with the drive train.
I do know that I have had a broken front spring, for quite some time. From what I understand, just the end of it. The car seems to ride level. I only notice it when I go over speed bumps and it creaks.
I don't know where to take the car to get a solution without trying a bunch of new parts.
October 30, 2009.

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