Vehicle and method for automatic gear selection in a gearbox forming part of a vehicle

A vehicle comprising a drivetrain, having an internal combustion engine (1) and a gearbox (9) coupled to the internal combustion engine, and a control unit (45) for automatic gear selection as a function of the current rotational speed of an input shaft to the gearbox (9), in which the control unit (45) has a first operating mode (56) with a first working speed range (81) defined by a first lower limit (68) for downshifting to a gear with a higher transmission ratio, wherein the control unit (45) has a second operating mode (57) with a second working speed range (70) defined by a second lower limit (69) for downshifting to a gear with a higher transmission ratio, in which the second limit (69) is lower than the idling speed (80) of the internal combustion engine and is equal to a lower rotational speed than the first lower limit (68), wherein the control unit (45) comprises a memory unit (72) in which a representation (74) of a highest permitted gear in the second working speed range (70) is stored, wherein the representation (74) of the highest permitted gear comprises a representation (74) defining the highest permitted gear when driving at idling speed as a function of the current weight of the vehicle and the current gradient of the road on which the vehicle is being driven.