FYI: As a general rule of thumb, the Federal Motor Vehicle Safety Standards at 49 C.F.R. 571.205 require that any glazing (i.e., glass) used in passenger cars, light trucks or multipurpose vehicles "at levels requisite for driving visibility" meet 70% light transmittance or better. The National Highway Traffic Safety Administration has determined that for SUV's like the Murano, this includes the windshield and windows to the immediate sides of the driver and front passenger. Windows past that point to the rear are not considered "at levels requisite for driving visibility" so may be darkened more than 70% - hence the privacy shading. This applies to minivans as well. States may only enact their own regulations to the extent they mirror FMVSS requirements.
Jim