Cuznvin, I'm glad your dealer took action (although someone else will probably get stuck with your tires). Based on your own earlier thread, I suspect your tires were overinflated by the dealer prior to delivery, and that caused an abnormal tread wear pattern to form. It doesn't take long with brand new tires. That, then, led to vibration at high speeds. The dealer's own error in overinflating – or at least allowing a car to be delivered with overinflated tires – is probably why the dealer was telling you vibration in a new car is normal -- it absolutely is not and Volvo would never tell you that. It's probably also why they swapped the tires out.. they realized what happened. I hope it works out well for you.