How to program the keyless entry on an Audi A3?

I recently purchased a used 2015 Audi A3 and would like to program the keyless entry system. How do I do this?

First, locate the keyless entry control module under the driver's side dashboard. Then, using the key fob, press and hold the lock and unlock buttons simultaneously for 10 seconds to put the system into programming mode. Finally, press any button on the key fob to complete the programming.

Make sure all doors are closed and insert the key into the ignition. Turn the key to the 'on' position and then back to 'off' twice. Remove the key and press any button on the key fob to complete the programming.

To reset the keyless entry, you will need to locate the control module and remove the cover. Press and hold the 'learn' button on the module for 10 seconds. After 10 seconds, press any button on the key fob to complete the reset.