I don’t know if this problem is known, but the lower tube clamp on the radiator grille likes to gammelt away at the S40/V40. As a result: car suddenly loses its cooling water, which is unpleasant with 180 things on the highway..So better times control and replace when the gammel is far advanced. With me “the collar” of the cooling water hose burst fortunately in the workshop, when pressing off the cooling system. Since I have seen this warning also in English forums, it is probably a typical Macke of the X40… So better to prevent, instead of cry afterwards. If it is already known, at least newcomers will be happy about it.