Editing Williams Racing (section)

====2005 season====
[[File:Heidfeld (Williams) in practice at USGP 2005.jpg|thumb|200px|[[Nick Heidfeld]] in the [[Williams FW27|FW27]] during practice for the [[2005 United States Grand Prix|2005 United States GP]]]]
For the {{F1|2005}} season, [[Ralf Schumacher|Schumacher]] moved to [[Toyota Racing (Formula One team)|Toyota]], while [[Juan Pablo Montoya|Montoya]] moved to McLaren. Taking their places were Australian [[Mark Webber (racing driver)|Mark Webber]] and German [[Nick Heidfeld]].<ref>{{cite web|title=Webber signs to BMW WilliamsF1|url=http://www.castrol.com/castrol/genericarticle.do?categoryId=9000062&contentId=7000426|archive-url=https://web.archive.org/web/20120208011946/http://www.castrol.com/castrol/genericarticle.do?categoryId=9000062&contentId=7000426 |archive-date=8 February 2012|work=Castrol|date=28 July 2004|access-date=13 July 2006}}</ref><ref>{{cite news|title=BMW sign Heidfeld for new F1 team|url=http://news.bbc.co.uk/sport1/hi/motorsport/formula_one/4251472.stm|work=BBC Sport|date=16 September 2005|access-date=13 July 2006}}</ref> [[Jenson Button]] was to have driven for Williams in 2005,<ref>{{cite news|title=Williams firm on Button|url=http://news.bbc.co.uk/sport1/hi/motorsport/formula_one/3541856.stm|work=BBC Sport|date=6 August 2004|access-date=9 June 2009}}</ref> but an [[Fédération Internationale de l'Automobile|FIA]] ruling forced Button to remain with his current team, [[British American Racing|BAR]].<ref>{{cite web|title=Williams: BAR can have Button but...|url=http://www.crash.net/f1/news/53476/1/williams_bar_can_have_button_but.html|work=Crash.net|publisher=Crash Media Group|date=29 August 2005|access-date=9 June 2009}}</ref> [[Antônio Pizzonia]] served as the test driver for the team during the 2005 season. Meanwhile, Button signed a contract to drive for Williams in 2006.

Although there was some positive moments, such as a double podium finish in Monaco and Heidfeld qualifying on pole position at the Nürburgring, Williams slipped further back down the field in 2005, due in part to the return to form of rivals McLaren and the emergence of Toyota as a front-running team. Williams failed to win a race for the first time since 2000, and only registered four podium finishes over the course of the season, finishing fifth in the constructors' championship with 66 points. Heidfeld was replaced by Pizzonia for the last five races of the season after the former suffered firstly a testing accident, and then was hit by a motorbike when out cycling prior to the race in Brazil. Pizzonia could only contribute two points towards the team's tally.

During the course of the 2004 and 2005 F1 seasons, [[BMW Motorsport]] and director [[Mario Theissen]] increasingly became publicly critical of the Williams F1 team's inability to create a package capable of winning the Constructors' Championship, or even multiple victories within a single season.<ref>{{cite news|title=BMW: Williams must improve|url=http://news.bbc.co.uk/sport1/hi/motorsport/formula_one/3036349.stm|work=BBC Sport|date=18 May 2003|access-date=8 June 2009}}</ref> Williams, on the other hand, blamed BMW for not producing a good enough engine.<ref>{{cite news|title=Williams criticises partner BMW|url=http://news.bbc.co.uk/sport1/hi/motorsport/formula_one/4075286.stm|work=BBC Sport|date=8 June 2005|access-date=9 June 2012}}</ref> Williams's failed attempt to prise [[Jenson Button]] out of his BAR contract may also have been an issue with Theissen. Despite [[Frank Williams (Formula One)|Frank Williams]]'s rare decision to capitulate to commercial demands by employing German driver [[Nick Heidfeld]] when he allegedly preferred [[Antônio Pizzonia]], the fallout between Williams and BMW continued through the 2005 Formula One season. Despite BMW's contract with Williams to supply engines until 2009, this public deterioration of the relationship between Williams and BMW was a factor in the decision by BMW Motorsport to buy [[Sauber]] and rebrand that team to feature the BMW name.<ref>{{cite news|title=BMW buys Sauber to form own team|url=http://news.bbc.co.uk/sport1/hi/motorsport/formula_one/4118472.stm|work=BBC Sport|date=22 June 2005|access-date=9 June 2012}}</ref>