S4 V8-4.2L (BHF) (2004)
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Remove screws - arrows - and remove left access panel.
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Carefully release and disconnect 4-pin connector - arrow - (left-side).
Assignment of 4-pin connector at fuel level sensor 2
1. Vacant
2. Sensor to fuel gauge
3. Sensor Ground (GND) ( - )
4. Vacant
