drivers' title, to their second seat alongside Mark Webber. Alexander Wurz, one of McLaren's test drivers from 2005, joined Williams as a third driver, alongside India's Narain Karthikeyan, who had raced for Jordan the previous season. Gary Paffett was promoted to a permanent testing role at McLaren alongside Pedro de la Rosa. Karthikeyan's seat at Jordan, now renamed as MF1, was taken by the 2005 Minardi driver Christijan Albers. MF1 decided to employ a rotation system for their third driver position. Minardi's other driver, Robert Doornbos, took up a test driving role at Red Bull. Vitantonio Liuzzi, who had shared Red Bull's second seat with Christian Klien in 2005, moved to Red Bull's newly acquired sister team Toro Rosso—previously Minardi—where he partnered his fellow Red Bull-backed driver Scott Speed. The Swiss driver Neel Jani became Toro Rosso's third driver. Mid-season changes After the San Marino Grand Prix Super Aguri's Yuji Ide had his superlicence revoked by the FIA and could no longer race in Formula One. He was replaced by the team's reserve driver Franck Montagny for the next race. Super Aguri hired Sakon Yamamoto, one of Jordan's test drivers from 2005, to be their third driver from the British Grand Prix onwards, in place of the promoted Montagny. Yamamoto and Montagny switched places from the German Grand Prix onwards. After the United States Grand Prix, Juan Pablo Montoya announced he was moving to NASCAR for the 2007 season and leaving McLaren. The next day, McLaren announced that Montoya would be replaced in their driver line up by test driver Pedro de la Rosa, ending Montoya's five and a half-year F1 career since 2001. Robert Kubica was promoted to a race seat by BMW Sauber at the Hungarian Grand Prix, replacing 1997 World Champion Jacques Villeneuve, possibly due to Villeneuve's injuries after a heavy crash in the German Grand Prix. On the day after the Hungarian GP (7 August 2006), BMW Sauber announced that Villeneuve had left the team with immediate effect, with Kubica replacing him permanently for the remainder of the season. German Formula 3 driver Sebastian Vettel became BMW Sauber's third driver from the Turkish Grand Prix onwards, replacing the promoted Kubica. On 11 September 2006, Red Bull Racing announced that the team's third/test driver, Robert Doornbos would replace the sacked-Christian Klien for the final three races of the season as a result of Klien's string of poor