46PSI is far too high for tyres for a normal car to be driven on the road. It will rob the car of any steering feel and could very easily lead to a loss of control. It's obvious to me that the tyres were supplied at storage pressures and the dealer did not check them before putting them on the car. This dealer's gross negligence could have killed you. For him to tell you that permissible pressures can be anything from 36PSI to 44PSI brands him as a blithering idiot who should not be running a dealership.