The invention relates to a method for assisting a driver of a vehicle when adjusting the safety distance to the vehicle ahead, wherein the operating mode of the preceding vehicle is detected by means of a radio-based communication device, which is assigned to one of the two possible states, namely automated / semi-automated or manual vehicle guidance and with the aid of sensors acting in the direction of travel, which comprises at least one radar, lidar, ultrasound or camera sensor system, the actual distance to the vehicle in front is measured and, depending on at least one parameter, the output of at least one warning signal takes place, which visually and / or acoustically and / or haptic.
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