A8L Quattro Sedan V8-4.2L (BVJ) (2007)
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Remove the (T10057), push locking tabs on external audio source connection 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 then up and remove the control unit from the frame - 1 -.
Installing
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Connect all harness connectors.
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Slide the external audio source connection on the mounting frame until it engages.