I am offered a GTCLusso with a panoramic glass roof. I am in the Philippines and its sunny here all year round with an average temperature of 32 celsius. Dealer says its a special glass that wont allow heat to come in. The roof has no blinds. I never open the blinds of the sunroof of my other cars because of heat, is it true that the Lusso's panoramic roof is so hi-tech it wont let the heat in?????