The Mercedes F1 W05 Hybrid, originally known as the Mercedes F1 W05, was a highly successful Mercedes-Benz Formula One racing car designed and developed under the direction of Bob Bell, Aldo Costa, Geoff Willis, Loïc Serra, Russell Cooley, John Owen, Mike Elliott and Jarrod Murphy to compete in the 2014 FIA Formula One World Championship.

[7][8][9][10][11] The cars were driven by 2008 World Drivers' Champion Lewis Hamilton and Nico Rosberg, both of whom remained with the team for a second and fifth season, respectively.

The car was an instant success, with Nico Rosberg winning the season-opening Australian Grand Prix by 27 seconds.

The car claimed every pole, led every lap, and won every race in the season up to the Monaco Grand Prix.

The F1 W05 Hybrid's streak ended at the Canadian Grand Prix where Daniel Ricciardo beat Nico Rosberg to the win, after the car's motor generator unit for kinetic energy (MGU-K) failed.

Rosberg's car failed to complete the race and Hamilton won in front of his home fans.

Hamilton again had an issue in qualifying, with a broken fuel line causing a fire, while Rosberg won pole again.

[28][29] The two Mercedes again locked out the front row at Italian Grand Prix and Hamilton was on pole for the first time since Spain.

[36][17] At the United States Grand Prix, Mercedes locked the front row out for the sixth successive race – and tenth time in 2014 – with Rosberg taking his ninth pole of the season.

At the Brazilian Grand Prix, Mercedes secured a seventh consecutive (and eleventh of 2014) front row lockout, with Rosberg finishing 41 seconds ahead of Felipe Massa in 3rd place.

Rosberg won the race and cut the gap down to 17 points going into the season finale in Abu Dhabi.