I have just acquired a 2012 Passat TDI Sel Premium with 235 45R18 Bridgestone 400 tires. I find them quite noisy (perhaps the word "harsh" better describes the effect) on all but the smoothest asphalt pavement. Of course interior noise is affected by the cars suspension, noise isolation, and noise insulation as well as the tires. The only thing I can control is the tires and I can't very well conduct my own tire survey. The only published data I have seen is the Tire Rack user survey where it scored good for noise and comfort. In addition, I have read many professional evaluations and don't recall negative comments on tire/road noise. However, some of these tests were conducted with the 215/55R17 Hankook 426 tire (note that a 55 is naturally quieter than a 45). My question: have any of you experienced "excessive" road noise with a 2012 Passat? and if so, or if not, what tire is on your car? I realize that noise is a judgement and for years I have been driving an Audi A6 which has a relatively quiet ride.