S6 Quattro Sedan V10-5.2L (BXA) (2007)
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Loosen the hose clamp - 1 - and remove the bolts - 2, 3 and 4 -.
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Remove left air filter upper section.
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Disconnect electrical connector - arrow - on Mass Air Flow (MAF) Sensor 2 (G246).
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Remove bolt - arrow - and remove power steering reservoir from bracket, hydraulic lines remain connected.