What is the main function of the headrest in a car?

The headrest in a car is primarily designed to enhance safety for the occupants. Its main function is to prevent whiplash injuries during rear-end collisions by supporting the head and neck. While it can contribute to comfort, it does not replace the seatbelt and is not primarily meant to improve the seating position. Only the first answer is correct because it addresses the safety aspect, which is the primary purpose of the headrest under German traffic regulations. Knowing this helps you select the right option when asked about headrest functions in the future.