Listen to this article With 15 minutes to go in first free practice, Vettel suffered a loss of power, forcing him to pull up his AMR22 car at the side of the track at Turn 10. After the chequered flag, Vettel used a marshal’s scooter to make his way back to the pitlane, running on the final sector of the track. The FIA soon launched an investigation as Vettel was deemed to have re-entered the track within five minutes of the end of a session without permission. On Friday night the stewards handed the German a 5,000 euro fine for his scooter-based adventure. Vettel said he had received permission from the marshal to use the scooter to enter the circuit, but the stewards deemed that neither he nor the marshal had received approval from race control to use the circuit itself rather than the usual perimeter road. That meant …