Method for Operating A Driver Assistance System, Driver Assistance System, And Motor Vehicle Having Such A Driver Assistance System

A method for operating a driver assistance system in a motor vehicle, comprising:

• detecting a slipstream region of a further motor vehicle driving in a predetermined surrounding region of the motor vehicle;
• ascertaining a current slipstream efficiency based on whether the motor vehicle is driving in the slipstream region and, if applicable, based on which of the slipstream partial regions of the slipstream region the motor vehicle is driving in;
• ascertaining an overall aerodynamic efficiency based on a current driving speed of the motor vehicle and the current slipstream efficiency;
• assigning to the further motor vehicle, based on the driving speed and slipstream region thereof, an individual overall aerodynamic efficiency potential that characterizes an overall aerodynamic efficiency that will be achieved by the motor vehicle when same drives in the slipstream region of the further motor vehicle.

A driver assistance system, configured to:

• detect a slipstream region of a further motor vehicle driving in a predetermined surrounding region of the motor vehicle;
• ascertain a current slipstream efficiency based on whether the motor vehicle is driving in the slipstream region and, if applicable, based on which of the slipstream partial regions of the slipstream region the motor vehicle is driving in;
• ascertain an overall aerodynamic efficiency based on a current driving speed of the motor vehicle and the current slipstream efficiency;
• and to
• assign to the further motor vehicle, based on the driving speed and slipstream region thereof, an individual overall aerodynamic efficiency potential that characterizes an overall aerodynamic efficiency that will be achieved by the motor vehicle when same drives in the slipstream region of the further motor vehicle.