I am convinced that a properly mounted wheel is the solution to this problem. Last year, when I had new summer tires and wheels mounted to my Touareg, I had the first appearance of the dreaded steering wheel shake. Once I detected the problem, I had the tires road force balanced and watched to make sure the tires were installed per the the tsb regarding steering wheel shake(hanger at 12:00, bolts tightened in a star patern incrementally, etc.). Once I had this done, there was no steering wheel shake, and my treg drives smooth as silk.
Fast forward to spring of this year. I have an Audi allroad that I use as my daily driver. I have a separate set of snow tires mounted on the oem wheels(18") that I use for winter. I had a tire shop switch out the winters for a previously mounted set of after market wheels(19") with slightly wider summer tires on Thursday. To my dismay, I had a slight amount of steering wheel shake on my way home. I had the summer tires and wheels road forced balanced and installed the previous summer with no shakes at all. Given my experience with the Touareg, I decided to reinstall myself the summer set with a similar installation procedure to the tsb, given that it is a 60 mile round trip to the tire store and I have access to an enclosed shop. I only had a floor jack and no jack stands, so I did not rotate each wheel hub to the 12:00 position, but I was very careful to tighten the lug bolts in a progressive, star pattern using a wheel hanger. Long story short, I have now eliminated steering wheel shake in two VAG products just by using a disaplined mounting procedure that used to be the norm. I am sure that the original switchover on the Allroad was preformed as quickly as possible with an air gun and no regard to tourque specs, pattern or progressive tightening.
These are finely engineered vehicles and require an attention to detail that is hard to find in service shops not familiar with our vehicles. I am happy to trade a little aggravation finding the correct service procedures for our vehicles in exchange for a driving experience that can not be duplicated with other vehicle makes.