A8 Quattro Sedan V8-4.2L (BVJ) (2008)
1. Not used
2. Wiring between fuel level sensor and instrument cluster (fuel gauge)
3. Not used
4. Ground (GND) for fuel level sensor (sensor ground)
4-pin Connector Assignment on Fuel Level Sensor 3
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
Right Fuel Level Sensor