A rear-view sensor system for a motor vehicle includes at least one sensor in the form of at least one of a rear-view camera and a lidar sensor positioned in the motor vehicle interior between a bodywork roof and a rear window, and a position-changing apparatus which moves the at least one sensor back and forth between a rest position and at least one operating position, where the at least one sensor is arranged in a recess in the rest position and is arranged right behind an upper part of the rear window in the at least one operating position.