General automatic transmissions have p, r, n, d gears. These four letters represent parking gear, reverse gear, neutral gear and forward gear respectively. Some automatic transmissions also have s-gear, m-gear and l-gear. S is the abbreviation of sport, which means sport mode. After shifting to S gear, the transmission will enter the sport mode. In this mode, the shift mode of the transmission will change, and the engine operation mode will also change. When the transmission is in gear s, the shifting time will be delayed. Only when the engine speed reaches the red line
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