Have one of those twist and fold reflective shields, and cabin is cooler than in direct heat, though it still gets warm, but it does kill the direct heat to the interior parts, and you never have any feeling that something maybe under threat from sun exposure, they are worth a try, the twist and fold ones i have fold to a small circle in couple of seconds and throw behind the seat into the rear, and grab when you know car is going to be parked in heat for sometime.