The Brackley-based team continue to shuffle their pack ahead of the start of the 2017 season.
Red Bull Racing managed two wins in 21 races with Mercedes winning the rest.
Rosberg captured his maiden F1 title beating Hamilton in 2016.
Bottas will partner Hamilton at Mercedes during the 2017 F1 season.
The 2016 world champion believes the out-of-contract pair will be targets for the Silver Arrows.
Montoya won seven races in his six seasons in Formula One with Williams and McLaren.
Rosberg defeated Hamilton in 2016 to capture his maiden F1 drivers' title.
Bottas replaced Nico Roserg as Hamilton's teammate for the 2017 F1 season.
Three-time world champion's competitiveness could see the Fin's days in the sport numbered.
Valtteri Bottas replaced Nico Rosberg at Mercedes after the German retired.
The German world champion wanted Fernando Alonso to partner Lewis Hamilton ahead of Valtteri Bottas.
Ecclestone was replaced by Chase Carey as the new CEO of Formula One.
Lauda was incensed with Rosberg's decision to quit F1 five days after his title win with Mercedes.
Rosberg announced his retirement from F1 just five days after winning his maiden
Paddy Lowe is on gardening leave since leaving Mercedes at the end of 2016.
Three-time F1 champion admits he 'doesn't usually get on with teammates' during Q&A.
Chase Carey was appointed chief executive of F1 following takeover by Liberty Media.
Mercedes have won three consecutive drivers and constructors' titles since 2014.
Ecclestone was ousted as the CEO of F1 following Liberty Media's recent takeover.
The 86-year-old is plotting to rival new American owners with new motor sport group by 2019.
Bernie Ecclestone had called for the driver penalties to be abolished.
Ecclestone was replaced as CEO of Formula One by Chase Carey after Liberty Media takeover.
Bernie Ecclestone has been removed as F1 chief executive following Libery Media's £6.4bn takeover.
The 86-year-old will now become chairman emeritus of Formula I.
The F1 supremo could still have a role to play in the sport.
Mercedes announced Bottas as Nico Rosberg's replacement for the 2017 F1 season.
Bottas was appointed as Rosberg's replacement at Mercedes for the 2017 season.
Bottas was confirmed as Nico Rosberg's replacement on Monday.
Shareholders have approved plans to acquire the motor racing company.
The Mercedes boss is no longer part of Bottas' personal management team after signing him for the team.