S6 Quattro Sedan V10-5.2L (BXA) (2007)
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Remove the screws - 2 - and - 3 - and the coolant expansion tank - arrow -.
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Disconnect the Engine Coolant Level (ECL) Warning Switch (F66) electrical harness connector - 1 - located at the bottom of the expansion tank
and set aside with the coolant hoses - 4 - and - 5 - attached.
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Remove the Ignition Coil electrical harness screws - 1 - and - 2 -.
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Disconnect the Ignition Coil electrical harness connectors from the Ignition Coils with Power Output Stage.
Checking voltage supply