Teams' supremacy reaches new heights, as they win 19 of 21 rounds en route to a third title double in a row. This time, however, it's Rosberg who lifts the drivers' crown following a titanic season-long struggle, shortly after which he shocks the team - and the F1 world - by announcing his immediate retirement from Formula One racing.
Hamilton leads Mercedes to a second successive championship double, the team once more emerging victorious in 16 of the year's 19 rounds, this time beating their own 2014 record with a stunning 12 one-two finishes.
Dominate first season of hybrid engine era, winning a record 16 of 19 races, with 11 one-two finishes. Secure maiden constructors' crown with three rounds to spare, and clinch first drivers' title since Juan Manuel Fangio in the 1950s courtesy of Lewis Hamilton.
F1 W04 inherently quick but initially hard on tyres. Four consecutive poles eventually yield first season win with Rosberg in Monaco, followed by others in Great Britain (Rosberg) and Hungary (Hamilton). Unable to hold onto Red Bull in later races and finish second overall.
Rosberg scores team's breakthrough win - Mercedes' first as works squad since 1955 - at round three in China, at wheel of innovative F1 W03, complete with unique 'double DRS' wing system. But pace drops off throughout season and the team struggles for further podiums.
Schumacher and Rosberg frustrated as team unable to improve on form as F1's fourth power, a fair way off frontrunners Red Bull, McLaren and Ferrari. Highlights include Schumacher's fourth-place finish in Canada and Rosberg's third-place grid slot in Turkey.
First Mercedes works squad since 1955 formed after purchase of Brawn GP team (formerly Honda (2006-2008), BAR (1999-2005) and Tyrrell (1970-1998)), but fail to maintain team's front-running form of '09. Michael Schumacher makes much anticipated F1 comeback, but outgunned by younger team mate Nico Rosberg. Fourth overall.