A4 Quattro Wagon L4-2.0L Turbo (CAEB) (2009)
All
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Remove the Radio Removal Tool (T10057), push locking tabs on External Audio Source Connection ( R199) to do so.
removing the internal control unit
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Remove the screw - 2 - on back side (2 Nm).
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Press the tabs - 4 - and - 5 - down and up and remove the control module - 5 - back from the frame - 1 -.
Installing
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Connect all harness connectors.
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Slide the External Audio Source Connection (R199 ) on the mounting frame until it engages.