Team co-owner Vijay Mallya said in a statement on Tuesday that the deal, which will make the cars stand out at the Australian season-opener next week, is one of the most significant partnerships in Force India's 10-year history.
Germany's Nico Rosberg stayed ahead of team mate Michael Schumacher to put Mercedes on top of the timesheets in practice for the season-opening Bahrain Grand Prix on Friday. After compatriot Adrian Sutil had stolen some of the returning seven-times champion's limelight in the first session with the quickest time for Mercedes-powered Force India, Rosberg went faster in the afternoon.
Mexican Sergio Perez will race for Force India next season, the British-based Formula One team announced on Thursday.
Sergio Perez expects to have his Formula One future decided before next month's Malaysian Grand Prix and said on Thursday that he is currently weighing up two options.
Embattled Force India co-owner Vijay Mallya will not be attending Sunday's Spanish Grand Prix but he is hoping for a change of fortune on the track at least for his Formula One team in Barcelona.
Troubled Force India co-owner Vijay Mallya dismissed speculation of a possible sale of his team to Australian David Brabham or Formula One's former commercial supremo Bernie Ecclestone.
Force India finished sixth in 2014 but spent much of last season calling for cost cuts.
Lewis Hamilton took pole position at the Italian Grand Prix for the third year in a row on Saturday with Mercedes team mate and title rival Nico Rosberg joining the Briton on the front row of the grid.
Force India are now 99 points clear of fifth-placed Williams, and 165 behind third-placed Red Bull, with a maximum 86 remaining to be won.
German Formula One driver Nico Hulkenberg will leave Force India and race for Renault in 2017 after signing a multi-year deal with the French manufacturer.
Formula One is due to go through a major technical overhaul next season, with wider wheels and chassis, and a more aggressive look with revised aerodynamics aimed at making the cars faster and harder to drive.
Britain's Lewis Hamilton won the Bahrain Formula One Grand Prix on Sunday after a thrilling duel with Mercedes team mate Nico Rosberg.
Formula One championship leader Nico Rosberg put Mercedes on pole position for the Bahrain Grand Prix on Saturday and ended team mate Lewis Hamilton's hopes of a hat-trick.