A six-gear transmission is a good number of gears for a car. First to third gears are good for speeding away from stoplights and corners, while fourth to sixth gears are typically used to cruise at varying speeds.
Drive (D4) — Use this position for your normal driving. The transmission automatically selects a suitable gear for your speed and acceleration. You may notice the transmission shifting up at higher speeds when the engine is cold. This helps the engine warm up faster.