The high courts of justice in the Spanish capital said that the Real Madrid left-back had admitted to the offences after reportedly being clocked driving at 134 km/h (83.2mph) in a 120km/h zone in December.
He was subsequently found to be without a valid licence.
Marcelo was told to appear at a second hearing in March when sentencing could be handed down.
In March 2013 the 31-year-old, who has been at Real since 2007, was fined 6,000 euros ($6,492) for driving after his licence had been revoked.
AFP