I had purchased 4 new tires Conti. DWs', installed, aligned, and balanced. After driving them for about 2 weeks, I noticed a moderate vibration at 60-70 mph. I took it back to the tire shop, twice. The second time the tire guy telling me that my left wheel is slightly bent, and that it may be causing the vibration. So he recommended me to some guy who does excellent work for a low price. I might do it, but not sure if that is the solution. If anyone who may have a similar situation, and fixed it. What did you end up doing? This car is costing too much $$ in the long run lol. But it goes to show, every car will end up breaking down one point in it's life time!