Sébastien Buemi
The only offseason driver change was following the retirement of Red Bull's David Coulthard after 14 years in Formula One. He was replaced by Sebastian Vettel, who had raced for Toro Rosso in 2008. Vettel's seat at Toro Rosso was taken by the Swiss driver Sébastien Buemi, who was Red Bull's test driver in 2008.