S6 Quattro Sedan V10-5.2L (BXA) (2007)
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Remove the air filter lower section upward - arrow -.
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Disconnect electrical connector - 1 - on Engine Coolant Level (ECL) Warning Switch (F66) at bottom of coolant expansion tank.
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Remove bolts - 2 - and - 3 - and lay aside coolant reservoir with connected coolant hoses - 4 - and - 5 -.
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Disconnect crankcase ventilation hose - 2 -.
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Disconnect the electrical connectors - 1 - and - 5 -.
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Remove the bolts - 3 - and - 4 -.
