Er, help. My '06 2.5 sport (53000 mls) gets to 65mph and all of a sudden the steering wheel starts to oscillate slightly and the car begins to wander and feel a bit unstable. The run flats have been binned, the front bushes been replaced, wheel balance checked and a full alignment check done. This irrespective of road surface or conditions.the car seems fine up till 65 and then it starts. a specialist has had a couple of looks at it, tried acouple of things but suspects the steering column. anybody any ideas?