Thanks for the info! From what you say then its probably not bearing-related. On the way in to work this morning I did a little experimentation and found that it goes from a slight rumble at 60mph to a definite shake (almost like an un-balanced tire) at 75-80. Like I said earlier, I just replaced the steering damper, had the tires re-balanced, and adjusted pressure to 27psi both front and rear. I guess its time to start looking at steering linkage and maybe have an alignment done.

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"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles