From the Chamartín Station:
Take the M-30 from the Calle Fray Bernardino Sahagún and Calle de Costa Rica, and keep on going to the Calle Bélmez/M-506. After 25 km aproximately, take the exit 15B from the A-42. Keep on going through the M-506 and drive direction to Avenida de la Industria/M-413 for 6,7 km aproximately.
This route will take you around 40 minutes.