A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
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Detach the underside cover - arrows -.
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Lift the rear seat out of the locking device.
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On convertible vehicles, also remove the side trim.
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Release the cable bracket, disconnect the speed sensor electrical connector - 1 - and press out the grommet (left and right sides are the same).
Installing
Installation is in reverse order of removal.