A4 Quattro Wagon L4-2.0L Turbo (BPG) (2005)
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Lever off both trim caps -3- with a screwdriver.
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Unscrew nuts -4- and remove both wiper arms -2-.
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Pull off clips -1- and remove cowl grille -5-.
Remove the electronics box from the plenum chamber as follows:
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Unscrew the bolts -arrows- and pull off the sealing cap.
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Carefully lever off the retainer bar with a screwdriver -arrow-.
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Release the connector catches -arrows- and detach connectors -1- and -2- of engine control unit.