2009 Formula One World Championship joined Brawn as a test driver. Force India joined Brawn GP in using the Mercedes engines by signing a five-year deal until 2013, having ended their previous supply contract from Ferrari. The retirement of Red Bull Racing driver David Coulthard led to the appointment of Sebastian Vettel as his replacement, who left the Scuderia Toro Rosso team after a successful previous season including winning the Italian Grand Prix. Toro Rosso, a team designed to develop new Formula One drivers, saw co-owner Gerhard Berger sell his half-stake back to Red Bull, claiming that the new regulations would "leave no room for
2010 Formula One World Championship to use it. The teams objected to what they believed would be a two-tier championship and five of the teams within the Formula One Teams Association (FOTA), Ferrari, BMW Sauber, Renault, Red Bull Racing and Toro Rosso announced their intentions to withdraw from the 2010 championship. BMW Sauber later announced on their withdrawal from Formula One at the end of the 2009 season, due to economic problems. Following negotiations, the FOTA teams unanimously decided to withdraw at the end of the 2009 season unless the budget cap rules were changed. Williams and Force India both submitted their own entries and