[mpbpulaski]

I have a vibration problem with my awd 300 limited. Steering wheel moves quite a bit at between 45-65 mph, less noticeable at other speeds. Its has been to the dealer 3 times now with this problem. 1st they balanced the tires. Then they balanced and "road forced" the tires. This last time they told me the conti's on it were shot and should be replaced (20k on car, been bad since 13k, no warranty).
So I got 4 new goodyear comfortreads and a 4 wheel alignment - problem is worse than ever.
I see here, and other places, a lot of people talking about balancing the tires. This isn't working.
Anybody else had this problem and actually gotten it resolved? What do I do?

Thanks