One (also labelled "L"): Restricts the transmission to 1st equipment only, also called a "low equipment". This is useful when a considerable torque is required in the wheels (such as, when accelerating up a steep incline); even so use at higher speeds can run the engine at an excessive speed, https://stephenoqolh.bloggadores.com/33334940/the-5-second-trick-for-gearbox-auto