Ventilation and areation device for a fuel tank

The invention relates to a ventilation and aeration device for a fuel tank of a motor vehicle, comprising a ventilation line leading to the exterior of the fuel tank; said ventilation line being connected to the inner area of the fuel tank via a ventilation opening of a ventilation link having a larger throughflow diameter and an aeration opening of an aeration link having a smaller throughflow diameter. The ventilation opening leads into the inner area of the fuel tank at a filling level height which is lower than that of the aeration opening of the aeration link. A roll-over valve is used to seal off the inner area of the fuel tank in relation to the ventilation line. The ventilation link and the aeration lead to a common ventilation channel leading to a single roll-over valve whose outlet is connected to the ventilation line.