S4 V8-4.2L (BHF) (2004)
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Disconnect electrical harness connector -3- from Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- (item -2-).
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Remove solenoid valve from bracket.
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Disconnect electrical harness connector -4- at Mass Air Flow (MAF) sensor -G70-.
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Rotate hose -1- to Secondary Air Injection (AIR) pump toward left and disconnect.
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Disconnect air guide hose -5- at Mass Air Flow (MAF) sensor -G70-.
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Remove bolt (arrow).
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Remove air filter housing with Mass Air Flow (MAF) sensor -G70-.
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Disconnect electrical harness connector (arrow) for Camshaft Position (CMP) Sensor -G40- at right cylinder head.
NOTE: The illustration depicts the engine removed from behind.
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Clamp off coolant hose -1- e.g. using hose clamp 3094 and disconnect from coolant expansion tank.
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Remove coolant reservoir -2- (arrows).
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Disconnect electrical wire from Engine Coolant Level (ECL) Warning Switch -F66- and set aside coolant reservoir with coolant hose -3-
connected.
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If necessary, seal the connection using an appropriate plug.