S4 Quattro Wagon V8-4.2L (BHF) (2008)
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Loosen hex nuts - 4 - by several turns.
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Loosen wiper arms - 2 - from wiper shaft by tilting slightly.
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Remove hex nuts and detach wiper arms.
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Remove securing clips - 1 - and detach cowl panel grille - 5 -.
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Remove cover for electronics box in plenum chamber - arrows -.
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Carefully pry off fastener - arrow - using a screwdriver.