S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
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Loosen hex nuts - 4 - by several turns.
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Loosen wiper arm - 2 - from wiper axle by lightly tilting.
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Remove hex nuts completely and remove wiper arms.
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Disconnect securing clips - 1 - and remove cowl panel grill - 5 -.
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Remove cover for E-box, plenum chamber - arrows -.
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Using a screwdriver, pry off retaining bar - arrow -.