I have a new Toureg, TDI Lux, 2012 and on the highway the steering wheel shakes. It happens around 65-85 mph, going straight, smooth road. The dealer when first told about the problem balanced the tires. It didn't fix the problem. Next they road forced balanced the tires, didn't fix it. Then they took it to a tire shop that they say has a better machine for balancing. It didn't fix it either. First they said, the tires are defective, then they said it's normal for vehicles with a truck chassis to shake like that. I don't believe that it's normal to have the wheel shake like that. Has anyone had a similar problem and how was it resolved?