How to Install an Aftermarket CD Player in a 96 Audi A4

1. Pull the hood release lever under the dashboard on the driver's side of the Audi. Move to the front of the A4.
2. Lift the hood to access the battery. Loosen the negative battery cable clamp with a 10mm socket wrench. Remove the cable from the terminal and rest it away from the battery. Return to the inside of the Audi.
3. Insert the extraction keys into the factory stereo. The slits are located at the bottom corners of the factory stereo face. Push the keys until they lock into place.
4. Pull outward on the keys while pulling the factory stereo from the stereo dock in the Audi's dashboard.
5. Disconnect the stereo wiring and antenna cable from the back of the factory head unit.
6. Slide the installation sleeve included with the aftermarket CD player into the vacant stereo dock inside the Audi's dashboard. Fold the metal tabs at the entrance of the sleeve downward with a flat screwdriver to secure the sleeve within the dock.
7. Connect the wiring connectors from the Audi's stereo wiring into the leads of the wiring harness adapter.
8. Plug the wiring adapter's lead connectors into the corresponding outlets on the rear panel of the new CD player.
9. Plug the antenna cable from the inside of the Audi stereo dock into the antenna outlet on the lower left corner of the new CD player's rear panel.
10. Slide the CD player into the A4's stereo dock (now lined with the installation sleeve). Push the new unit into the opening until it snaps into place within the sleeve. Return to the engine compartment.
11. Place the negative battery cable back around the Audi's negative battery terminal. Tighten the cable's clamp with the wrench. Close the A4's hood.