According to one aspect of the present invention, a system for determining target plausibility is comprised of an imaging device for imaging a scene and generating image data, sensors for generating hitch angle measurements, steering angle measurements, and vehicle speed measurements. In order to attain a compact structure, the blade holder has a pressure piston, on which the blade is held in such a way that it can be replaced. A manual actuator can be used to facilitate the opening and closing of the tarp.