After parking my 300SEL up for 6 months, I finally decided to take it out for a good long run.
I noticed a vibration that starts to come through the steering, and then you can feel it through the whole car, as if the whole thing starts to shake. I changed the steering damper, and had the wheels balanced, but its still the same.
The vibrations start at 55mph (through the steering wheel), and then get bad at 70-80mph and then real bad at 90-120mph.
This problem was never there before, and the car always used to run real smooth. Could this be that the tyres have gone out of shape because it has been parked up for so long?