This is kind of a general question about wheel bearings on my newly-purchased '97 S420 with 85k miles on it. The car rides just fine, although it needs shocks. What had me puzzled though is a slight rumble I feel through the steering wheel at highway speed. The only thing I can think of would be the wheel bearings going bad. Can anyone confirm/debunk this?

So far I have replaced the steering damper (it was leaking anyway), and had the (almost new) tires re-balanced. These two thing cleaned-up the front end's behavior quite a bit but I'm still trying to pinpoint the source of the rumble. My '97 S320 is smooth as glass in comparison. I'd appreciate any thoughts.

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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