Audi A4 2012 Owner's Manual page 143

When completed, the Homelink ® system will
be in the programming mode and is then
ready to learn the codes for remote contro ll ed
devices.
@
Tips
- Programmed buttons cannot be erased
individually.
- For security reasons you are advised to
erase the programming of the Home-
Link® system before you sell your vehicle.
Homelink ® 141