Does anyone know the purpose of the louvered opening in the cargo door? Thanx

 

I think it's just for airflow since the doors seal tightly. Allows incoming air a place to go. If you look around, you'll notice all cars have an exit for air discreetly tucked somewhere - doors, pillars. There's often a vent in the rear window that leads to a hidden exahust vent. The H3 flaps are designed to let air out, not in. [/align]