A4 & S4

Loosen fuel filler cap to release pressure in fuel tank. Remove fuel pump relay. Fuel pump relay is located in position 4 of micro-electric center in driver's footwell. Start engine. Allow engine to run until it stalls. Turn ignition off. Disconnect negative battery cable. Slight pressure may remain in system. Before disconnecting any fuel system line, cover connector with a clean shop towel. Reinstall fuel pump relay.