Covered for the full 3 years of the standard warranty period. mine was one month old when I got my S3 and it came with the remaining roadside cover, so n my case 2 years 11 months.
The documentation is confusing, essentially I understand used approved Audi's do in fact only come with one year warranty/breakdown, but where the standard warranty/breakdown from when the car was new is still in place - as in your case - the balance of this - if greater than one year - takes precedence.
So for example if you bought a used AUDI after 30 months, you would get one years warranty. Buy it at 8 months old you get the balance of the standard warranty (incl roadside) so in your case 2 years 4 months worth.
Hope that clarifies!