hi welcome back, do not know if understand your question, but
You might be referring to the cercanias train that if you have your AVE ticket you can ride it to the train station for free, yes
here is from Renfe
Free Cercanias Ride – Combinado Cercanias - Travelers on AVE trains have the option of beginning or completing their journey on the CercanÃas network in those cities where the Cercanias (local train services) operate at no extra charge. Travelers may take a CercanÃas train from any station in the city’s network to reach the AVE train’s departure station. They may also complete their journey by taking a CercanÃas train from the AVE train’s arrival station to any CercanÃas station in the network, as long as the AVE train’s departure and arrival times, including any travel between different main line stations in the same city, are compatible with travelling on CercanÃas trains. When the AVE ticket is purchased, it generates a password which will be printed on the ticket. By using this password, you can take advantage of two journeys on CercanÃas trains, one in the departure city and the other in the arrival city. You can obtain your CercanÃas tickets at ticket booths, or by using the automatic ticket machines, on the travel date shown on your AVE ticket. You can use the Cercanias train 3 hours before your AVE leaves and 3 hours after your AVE arrives at its destination.
hope it helps
Edited by pedmar (02/20/17 01:23 PM)