The invention relates to a method for operating a driver assistance
system for longitudinal control of a motor vehicle, in which, during a vehicle journey, the actual vehicle speed is regulated to a target vehicle speed, wherein the driver assistance
system has a setting unit for manually setting the target vehicle speed, and a speed unit for determining a speed
setpoint on a road segment, in which, when the speed
setpoint is changed, the old speed
setpoint and the new speed setpoint are compared with the current target vehicle speed, if the current target vehicle speed was manually set by the setting unit, in which the new speed setpoint is automatically adopted as the new target vehicle speed.except when the current target vehicle speed is lower than both the old speed setpoint and the new speed setpoint, whereby, if a speed setpoint is determined and a target vehicle speed is manually set, a deviation between the manually set target vehicle speed and the speed setpoint is determined, the deviation is compared with a stored threshold value, and the detected speed setpoint is adopted as the target vehicle speed if the deviation is less than or equal to the threshold value.