Method for improved automatic control of a function in a terrestrial vehicle that includes an automatic control of the function, determination of the position of the vehicle on the ground (x, y) and comparison of the position of the vehicle with one or several previously stored positions. The previously stored positions are positions in which it has been determined that the control automation has carried out a control that was outside a predetermined permitted range on previous occasions, and if the determined position of the vehicle conforms with one of the previously stored positions, special previously stored control information is used to reduce the risk of the control being outside the predetermined permitted range yet again. The invention can also include evaluation of the automatic control of one or several functions in the vehicle, and storage of positions (x, y) on the ground at which the evaluation has shown that the automatic control has carried out a measure that was outside the predetermined permitted range.