S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
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Connect a jumper cable from an Electrical connector test lead set to terminal - 4 - of the fuel delivery unit and to vehicle Ground (GND).
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Remove the fuel filler cap from fuel filler tube.
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Remove rear engine cover - arrows -.
CAUTION: Fuel system is under pressure. Before opening the system, place rags around the connection area. Then release the pressure
by carefully loosening the connection.
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Disconnect fuel line - arrow - at distribution piece.
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Connect an assisting hose onto the disconnected fuel supply line and hold into a measuring container.
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Press switch on remote control for 15 seconds.