How to Install Speakers on an Audi A4

1. Sit in your driver's seat and look for the five screws in the door that attach the inner panel to the metal frame.
2. Locate the first two screws at the top of the door near the window. The first will be on the top right and the second on the top left. Unscrew them using your Phillips- head screwdriver.
3. Pry off the plastic piece beneath the door handle with the flat-head screwdriver. The plastic is in the sunken part where you put the tips of your fingers when you pull the door closed. You'll find the third screw underneath this plastic piece. Once you remove the third screw you will be able to find the final two.
4. Pull the door panel toward you half an inch. Insert the flat-head screwdriver into this gap and pry out the plastic clips that keep the door panel attached to the car's frame. Pull the panel toward you 3 inches. Disconnect the electric cables for the windows, mirror or power locks in the same manner you disconnect a phone from its jack, squeezing the plastic plugs and gently pulling. Remove the door panel
5. Remove the screws in your factory speaker. Disconnect the speaker from its wiring harness and discard the speaker. Screw in your new speaker. Connect your new wiring harness to the old one by plugging the cables into it. Put the door together and repeat these steps for the passenger side door.
6. Remove the parcel tray so you can get to the rear speakers.Fold down your back seats and open the trunk. Look for a black clip near each rear brake light. Unclip these by pulling them up. Return to the back seat, lift the tray and pull it toward you. Unscrew the speakers and replace them.