Service Vent Valves

The fuel tank incorporates 2 service vent valves with a rollover function: if the car is inclined at an angle exceeding 45° (impending or actual rollover situation), the floats in the service vent valves close off the vent apertures. This prevents any fuel from escaping through the activated carbon filter.

A compensating volume is required in the fuel tank for the service venting function. This compensating volume is the space above the fuel level when the fuel tank is completely full (approx. 6 liters). The compensating volume remains unfilled when automatic cutout of the fuel pump nozzle is triggered.