A8L Quattro Sedan V8-4.2L (BVJ) (2007)
1. not used
2. Wiring connection from fuel level sensor to instrument cluster (tank display)
3. not used
4. Fuel level sensor ground (sensor ground)
4-pin connector assignment on Fuel Level Sensor 4 (G393)
1. Switched-positive connection of electric fuel pump
2. Wiring connection from fuel level sensor to instrument cluster (tank display)
3. Fuel level sensor ground (sensor ground)
4. Ground (GND) for electrical fuel pump