Love the car; hate the noise. Very quiet up front, well-isolated engine and wind noise. Perhaps that is why I am hearing a bunch of road or tire noise from the REAR only. Noise varies somewhat with speed but it is driving me crazy. Somewhat muted with the stereo at volume level 12 (or higher). I have not been to the dealer yet but am wondering if something is NOT properly sealed or undercoated in the rear. I noticed the wheel wells are partially coated but mostly plastic. Plus, since this is a GLS, there is a large void in the underbody where the second muffler & associated hardware/piping goes on the SE. Not sure if the LIMITED model has additional sound deadening material but my GLS is too noisy. Any thoughts from the group on this?