How to Change the Battery on a 1999 Audi A4


1. Pop the hood. Peel back the rubber molding located between the firewall and the plastic cowl and lift off the plastic cover. Use a Phillips-head screwdriver to disconnect the cowl from the windshield area, then disconnect the remaining bolt in the passenger-side corner of the cowl with the 3/8-inch ratchet and socket. Lift the cover away from the vehicle.
2. Disconnect the negative terminal on the battery with the open-end wrench, then follow suit with the positive terminal. Unbolt the battery tie-down strap using a combination of the ratchet and an open-end wrench and lift the battery out of the engine compartment.
3. Set the replacement battery in the engine compartment, making sure that the terminals are in the same orientation as the original battery. Connect the positive terminal, then the negative terminal with a wrench. Reinstall the battery tie-down..
4. Set the windshield cowl back onto its original location and install it with the Phillips-head screwdriver and the 3/8-inch ratchet and socket. Set the battery cover over the battery and push the rubber molding back over the end.