1 Solenoid (in tank flap)
2 Tank flap switch (reed contact)
The tank flap switch is incorporated into the fuel filler neck insert. The actuating solenoid is located in a bracket on the tank flap. The tank flap switch is a reed contact and informs the fuel additive control unit that the fuel tank is filled. However, the fuel additive control unit only registers that refueling has taken place if detected by the fuel level sensor in addition to the tank flap switch signal and if the vehicle is traveling at a speed of