How to replace the Spark Plugs + Engine Air Filter - Audi A6 C6 2006-2010, 4.2 FSI V8

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How to change the spark plugs and the engine air filter on a 4.2 l FSI petrol V8 engine which was used in the Audi A6, A6 Allroad C6 made from 2006 to 2010
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