Abstract: Many motor bonnets of front motor vehicles produce danger in case of frontal collision, because the bonnet then is pressed like a razor into the passenger compartment of the vehicle. Other bonnets cannot readily be opened because the edge of the cover to be gripped, is not reasonably accessible. This danger and disadvantage are overcome by using hinge members having two points of rotation, especially swan necks, and by using rectilinear recesses accommodating rolls in such a way that the bonnet can easily be manipulated but nevertheless is very safe in case of a frontal collision. For further protection of the user against the bonnet being blown shut, a special spring bias fixing rod element is incorporated into the bonnet.