We dont know. The roof wasn't there. There is possibility that the curtain airbags must have deployed. As the car hit rear. Front driver and passenger will bags will not deploy. You must also know that rear of the car espacially rear seats back have strong steel plating if in case rear ended. There are no air bags there. Rear have always curtain and bags as the rear is designed that way. If we assume for a second that same mass and force hit at front.. The situation might have been altogether different. Front air bags would have been deployed. We should also know that. If there is no passenger in front seat then even passenger front airbag even don't deploy. That the reason you see passenger seat airbag off signs .
The car has front and rear crumple zones and as per Mercedes benz safety feature for this car the car has front and rear head airbags. Also passenger airbag activates at front only when weight is detected which is a normal feature and every car even corolla has it..
