May 30 (GMM) Williams on Thursday announced a "long-term" engine deal with Mercedes, beginning in 2014.
The great British team is currently powered by Renault's V8 engine, but - as F1 switches to new regulations at the end of the season - the French marque is charging more than Mercedes and Ferrari for its turbo V6.
"Williams will continue to manufacture its own transmission," the team said in a statement.
"This new agreement provides Mercedes-Benz with the long-term stability of supplying our works team and at least two partners from the 2015 season onwards, following the conclusion of our relationship with McLaren at the end of next season," said Mercedes' engine managing director, Andy Cowell.
The other Mercedes-powered F1 team is Force India.