S4 V8-4.2L (BHF) (2004)
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Remove rear engine cover - arrows -.
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Remove front engine cover - arrows 1 and 2 -.
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Remove cover - 1 - in engine compartment (left side).
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Remove bolt from coolant reservoir - arrow -.
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Disconnect electrical wiring from Engine Coolant Level (ECL) Warning Switch -F66- and set aside coolant reservoir with coolant hoses - 1 - and -
2 - connected.