Silicone Valley is located more near L.A. (porn industry in the San Fernando Valley area). Silicon Valley is in the South San Francisco Bay Area and includes cities such as Mountain View, Sunnyvale, Santa Clara and San Jose. To the OP: I bought my car back in July 2018 and paid for the Premium Upgrade Package (PUP). It appeared NOT to come with heated rear seats as there was no control for them. Later on an update appeared that included controls over the rear seats. The heating elements were there all the time but the user interface never allowed access to them until that update was released. Should I have been charged "extra" when they were enabled? From my recollection there was nothing mentioned about the car having heated rear seats with the PUP. Consider your usage of the heated rear seats as a "bonus" and if you REALLY miss that feature, then see if it's possible to upgrade your car.