An inspection before the car is registered is important.Once the car has been registered in your name there is nothing you can do.If you find a mechanical flaw or body damage you can ask for another car to be registered in your name,but once its registered it'll have to be taken to the service center to get it fixed.In my Opinion you must do a PDI before the car is being registered and another before taking the delivery of the car.
exactly, PDI checklist is more important before the car is registered in your name, cause before registeration,you can reject to accept a particular car, what its reasons but once thats happened, dealer would be king.