S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
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Remove coolant reservoir - 2 - - arrows -.
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Disconnect electrical wire to Engine Coolant Level (ECL) Warning Switch (F66) at bottom of reservoir and lay aside coolant reservoir with
coolant hose - 3 - connected.
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If necessary, seal connector with proper plugs.
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Remove electrical harness connectors - 1 through 4 - from bracket at left of bulkhead.
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Disconnect electrical connectors - 1 -, - 3 - and - 4 -.
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Remove bracket on bulkhead.
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Remove heat shield sleeve on wiring harness and expose wiring harness.
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Expose oxygen sensor wiring below.
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Remove right cover - 1 - in engine compartment.