The invention relates to a method and device for null-balancing of a displacement measurement in relation to movement transmitted from an actuator to a clutch in the drive train of a motor vehicle between a drive engine and a mutually operated gearbox whereby the engagement point of the clutch is detected and forms the reference point for null-balancing of said displacement measurement. The invention also relates to a method for recognizing/processing errors in incremental measurement of the position/speed of an actuator in a motor vehicle, whereby two sensors are arranged in an offset position along the movement path of an element and whereby de-phased pulse signals are generated when said element moves and are subjected to a correlation test and/or plausibility test by an evaluation circuit.
