1 (also labelled "L"): Restricts the transmission to 1st gear only, generally known as a "low gear". This is helpful when a big torque is needed with the wheels (such as, when accelerating up a steep incline); however use at greater speeds can operate the engine at an extreme speed, https://keeganckqss.theideasblog.com/34640569/an-unbiased-view-of-gearbox-auto