Steering Vibration:
I am writing about my C200k avant-garde.
I am having an issue with the ‘steering’ feel I am getting. Every now and then I am getting a vibration/oscillation (shaking from side to side) through the steering.
I have noticed this does tend to occur at higher speeds, 80km/h +, but have not noticed that it occurs on any particular road surface type. Our road surfaces here in Australia can vary quite a bit, ranging from different grades of tar to concrete, but the problem does not seem to arise at certain locations on certain surfaces. It actually seems to be quite random, but at higher speeds.
This issue has just come about after I got rid of the standard 17inch avant-garde alloys and Bridgestone Potenza tyres and replaced them with 18inch Pirelli Rosso Tyres and alloys. I have had a balance and alignment done twice and the garage, which is not the same place I bought the wheels and tyres from, assures me the wheels are fine and the balance is spot on.
The car does pull to the left, however the steering wheel is straight when driving in a straight line, so I’m led to believe this is more to do with the slight camber of our roads here.
I’m just a bit lost as to where to start looking for problems. What could be causing the vibration/shaking from side to side. Sometimes is perfectly fine, and then the problem just appears. Are there any obvious things I should be looking at? Any possible suspension issues that may be the cause etc.?
I really would appreciate any help/guidance.
Thanks.


