What does s and b on vitz gearbox do?

On a Toyota Vitz gearbox, the "S" and "B" modes refer to different driving settings. The "S" mode stands for "Sport," which enhances engine responsiveness and performance for a more dynamic driving experience. The "B" mode, or "Brake," is designed for engine braking, helping to control speed on downhill slopes by increasing engine resistance. This can aid in reducing wear on the brakes and providing better control in certain driving conditions.