lead in the World Championship. In Bahrain, the fourth race of the season, Vettel qualified in second place behind Nico Rosberg. Webber qualified fifth but after a 3 place grid penalty started the race in seventh. In the race, Webber failed to improve on his qualifying position finishing 7th whilst his teammate won the race in a dominating fashion. After the fourth race of the season, Infiniti Red Bull finished the first round of flyaway races leading both the Drivers' and Constructors' Championships. Sebastian Vettel extended his contract with Infiniti Red Bull Racing until the end of 2015, despite interests in racing for Ferrari and Mercedes. At the , Mark Webber announced his retirement from Formula One at the end of the season, having signed a deal with Porsche in the FIA World Endurance Championship for 2014. It was then announced before the Italian Grand Prix that Daniel Ricciardo, the Toro Rosso driver, would replace Webber for the 2014 season, ending talk of Lotus's Kimi Räikkönen taking Webber's seat. At the , Vettel secured the team's 50th pole position, and 40th Grand Prix victory. At the , Vettel sealed the Drivers' Championship title, and in doing so, won the Constructors' Championship for Infiniti Red Bull Racing for the fourth consecutive year. 2014 season Infiniti Red Bull started the season with reigning World Champion Sebastian Vettel and Daniel Ricciardo who replaced Mark Webber after he had announced in 2013 that he would be moving to Porsche in the World Endurance Championship for 2014. In pre-season testing, it became clear, not just from Red Bull, but other Renault teams that the Renault engine was very unreliable and down on power compared to the Ferrari and Mercedes engines. Renault struggled to get the new hybrid engine to function properly all through testing with the combustion engine, the kinetic recovery system, and the turbo all unable to work as one. At the , Ricciardo had qualified second on his first race for the team while Vettel qualified a rather distant 13th being at least 1.8 seconds off pole-sitter Lewis Hamilton. In the race itself, Ricciardo finished second while Vettel retired after just three laps due to a power unit failure. However, after the race, Ricciardo was disqualified for violating the FIA's new rule of capping fuel use at 100 kg per hour in each race. He thus lost his podium finish. Red Bull appealed