S6 Quattro Sedan V10-5.2L (BXA) (2007)
NOTE: Disregard - item 5 -.
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Open clips - arrows - and remove upper air filter housing.
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Disconnect vacuum line - 1 -.
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Remove pin of expanding clip - 4 -.
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Remove lower air filter housing and disconnect electrical harness connector - 2 - at rear from Intake Air Switch-Over valve N335.
Installation is performed in the reverse order of removal.