A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
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Loosen lock nut - 2 -.
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Pre-adjust bypass flap - 1 - via knurled nut - arrow - so flap can still just be turned by hand.
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Install lock nut hand tight.
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Connect hand vacuum pump (VAS 6213), turbocharger tester (V.A.G 1397A) to connection II and pressure regulator valve (VAS 6342) as
depicted in the illustration.
