The ball glide nut steering mechanism of the Citroen 11CV/15CV is a crucial mechanical component that ensures precision and smoothness in steering. This system utilizes steel balls housed in a glide nut to efficiently transfer the movement of the steering wheel to the car's wheels. This type of steering mechanism was innovative for its time, mainly because it enabled both lightweight and accurate steering. The unique construction contributes to the distinctive driving experience of the iconic mid-20th-century Citroën models.