You found the Achilles heel of the heavy weight German SUV, it eats tires. Tire cupping, noise, vibration you name it and I found this on the VW and on my 2011 Audi Quattro, that it's not covered by any warranty. VW threw some money toward the problem and that was appreciated. Now even when the rig is aligned properly. You look at the tires and the tread looks good, run your hand over the tread and it goes up and down. I call it the 'green door' an area of speculation. Is the cause?; the tire manufacturer, the heavy weight of the vehicle, Light Truck Tires v P Metric, American roads are only 9" thick or geometry, no no it's how you drive... It took some of the charm out of the very unique SUV.