david,
New tires need some miles to get settled on the rims. It may occur that the wheels start to shudder after a while and they need to be re-balanced. That is perfectly normal...and that probably causes your 60mph shuddering.
jjrodger,
I have renewed my C250D steering damper once by now. The car has run 365.000km. You can check the steering damper by loosening it on one side and push/pull it a couple of times. If it is rather stiff in pushing and pulling it is still all right.
You will notice when the steering damper is worn...
greetingz,
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1990 300SL-24
1993 C250D with a minor 600+k kilometer
www.MBenzNL.com(the Netherlands)
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