When writer-director Ryusuke Hamaguchi first laid eyes on the red Saab 900 Turbo at the center of his award-winning film “Drive My Car,” he knew it was the one. Over thirty years old and in immaculate condition, the car was perfect. It needed to be — he’d be spending a lot of time inside. “It almost feels like the best casting that I’ve ever done,” Hamaguchi recalled in a video interview with CNN.