S6 Quattro Sedan V10-5.2L (BXA) (2007)
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Loosen the air duct hose clamp - 1 -.
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Remove the air duct screws - 2 to 4 - and the air duct.
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Disconnect the Mass Air Flow (MAF) Sensor 2 (G246)/Intake Air Temperature (IAT) Sensor 2 (G299) electrical harness connector - arrow -.
Checking voltage supply
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Using a multimeter, check the Mass Air Flow (MAF) Sensor 2 (G246)/Intake Air Temperature (IAT) Sensor 2 (G299) electrical harness connector
terminal 2 to engine Ground (GND) for voltage.