Liquide incompressible composé d'huile et d'additifs, utilisé pour sa capacité ? transmettre les forces statiques et dynamiques requises dans un frein hydraulique
If the vehicle is driven by external means, the fuel feed system shall be filled to at least 90 % of its capacity with a non-flammable liquid having a density between 0,7 and 1. All the other systems (brake-fluid reservoirs, radiator, etc) may be empty.