Allan McNish, Jean Alesi, Heinz-Harald Frentzen, Ralf Schumacher, JJ Lehto, Pedro Lamy, Karl Wendlinger, Emanuele Pirro, Stefano Modena, two-time F1 world champion Mika Häkkinen and former F1 2008 Canadian Grand Prix winner Robert Kubica. Others, such as Laurent Aïello, Tom Kristensen, Dindo Capello, Frank Biela, Marco Werner, Lucas Luhr, Alexandre Prémat, Yves Olivier, Jaroslav Janiš, and Alain Menu have made their career racing in sports cars and touring cars. The DTM is also increasingly being used by young drivers such as Robert Wickens and Gary Paffett to jump-start their racing career in single-seaters. Wickens was in the 2012 Mercedes young driver program and in his first year of DTM. This strategy appears to have worked well for Christijan Albers, who built a reputation by finishing second and third in the 2003 and 2004 championships with Mercedes-Benz and then graduated to Formula One in 2005. He came back in 2008, but this time driving for Audi. After winning the championship in 2010, Paul di Resta raced from 2011 until 2013 for Mercedes-engined Formula One team Force India. He has now returned to the Mercedes DTM team. Pascal Wehrlein, who has won the championship in a Mercedes car in 2015 went on to race for Sauber F1 Team and was a test driver for the Mercedes F1 team. Gary Paffett has also used his championship win to gain a test with McLaren, and they signed him as permanent test driver for 2006. This prevented Paffett from defending his title in 2006, however he thought that it will be a springboard for a race seat during the 2007 Formula One season. The plan failed however, and Paffett returned to DTM in 2007, but in a 2006 specification car. Four female drivers have taken part in the championship. In 2006 Vanina Ickx started racing for Audi and Susie Stoddart-later-Wolff in 2011 for Mercedes. In 2008 Ickx was replaced by Katherine Legge, who was subsequently replaced for the 2011 season by Rahel Frey. Cars, technology and specifications (silhouette touring car racing all eras) Vehicle, chassis Deutsche Tourenwagen Masters cars closely resemble public road vehicles but custom-built into a racing version as a reference of silhouette racing car format. The championship controls and specifies the chassis/car and engine manufacturers that teams are allowed to use each season. The league's choice of manufacturers are changed every year. Opel provided cars and Spiess engines in 2000–2005 with two