on 2 july, carroll made a one-off appearance in the formula renault 3.5 series at the sixth round of the championship where he finished fourth and third in the two races. this was in place of the injured austrian driver, walter grubmüller. he also drove in the donington round of the auto gp series taking pole and finishing 5th and 2nd in the races. he then returned to gp2 with super nova racing for the german round replacing luca filippi.