S5 Quattro Coupe V8-4.2L (CAUA) (2009)
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Disconnect electrical connector - 1 - on Mass Air Flow (MAF) Sensor (G70).
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Disconnect the vacuum line - 3 - from the air guide pipe.
CAUTION!
Risk of violating emissions legislation.
‹› Do not open hose connection - 2 -!
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Lay aside air guide pipe with connected crankcase ventilation hose - 2 - by loosening hose clamp - 4 - and opening clips - arrows -.
Continuation for the right secondary air injection (AIR) combi-valve:
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Remove secondary air hose - arrow - by pressing the release buttons.
‹› Ignore - 1, 2 and 3 -.
Continued for both sides:
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Connect the auxiliary hose - arrow - to the combination valve for Secondary Air Injection (AIR).