I think it’s more a perfume they add to mask the scent of the plastic. You can get "new car scent’ in a spray bottle, after all.
Over time, your car windows will develop a haze on the interior side that needs to be cleaned off. That haze is the condensation of the volatile organic compounds being “outgassed” by the plastic in the car.
The windows in your house haze for the same reason. Common things like carpet are made from plastics that outgas, too.