Red Bull Racing was not the start of Red Bull's involvement in Formula One, as they sponsored Sauber from 1995 to 2004. After buying a Formula One team of its own, Red Bull ended its long-term partnership with the Swiss team. Red Bull also runs a young drivers programme, Red Bull Junior Team, whereby Red Bull sponsors promising young drivers. High-profile drivers who have received this backing include Enrique Bernoldi, Christian Klien, Patrick Friesacher, Vitantonio Liuzzi and Scott Speed. Red Bull also sponsors many drivers and teams competing in the Formula 2 Championship, Formula One's "feeder" series. Cosworth engines (2005) 2005 season Red Bull's owner, Dietrich Mateschitz, reportedly tried to recruit former Formula One driver and BMW Motorsport chief (and fellow Austrian) Gerhard Berger to help guide the team through its debut season. However, this was never realised. For , the chassis was christened the RB1. Red Bull Racing used Cosworth engines in its maiden year due to the ease of continuing with the engine Jaguar Racing used. Former McLaren driver David Coulthard led the team. Coulthard was chosen for his experience, considered ideal to help lead the fledgling team. For the second car, Red Bull shared the drive between two of its young sponsored drivers: Christian Klien, who had driven for Jaguar in and 2004 F3000 champion Vitantonio Liuzzi. At first, it was announced that Klien and Liuzzi would swap driving duty every four races, but by the end of the season, Liuzzi had appeared only four times. Red Bull's first year in Formula One was a massive success compared to its predecessors, Jaguar Racing. They were 6th in the Constructors' Championship for most of the season, only beaten by the fast-improving BAR Hondas at the end of the season. In a single season, they amassed more points than Jaguar had in and 2004. Coulthard, after a poor 2003 and 2004 with McLaren, was a revelation for the team while Klien showed that he had vastly improved from 2004. Overall they scored 34 points; 24 for Coulthard, 9 for Klien and 1 for Liuzzi. Red Bull was a consistent point and occasional podium challenger for most of their debut season. American driver Scott Speed, who rose through the ranks in the American equivalent of Red Bull Junior Team, Red Bull Driver Search, was Red Bull Racing's third driver in 2005 for the Canadian and United States Grands Prix. Speed