Mark Ellis and Giles Wood will join Mercedes AMG Petronas from Red Bull Technology.
Lotus is still working to make 2014 simulator as accurate as possible.
Ross Brawn hopes to return to F1 after a sabbatical.
Niki Lauda claims Ross Brawn will return to Formula One.
Martin Whitmarsh said the rumours Mercedes will lead the game in 2014 cannot be verified.
Schumacher admitted he is worriedly watching the situation from the sidelines.
Ross Brawn will formally leave the team on 31st December 2013.
The team finished the 2013 season with a total of 360 points and a total of three wins, six further podiums and eight pole positions.
Qualifying in Sao Paulo for the Brazilian Grand Prix was delayed due to the flooded areas on the Interlagos circuit.
Lewis Hamilton qualified in the top five for the 17th time in 19 races this season.
Toto Wolff: "We had two decent sessions today, which further confirmed the tendency already seen this season that our car performs well in mixed conditions."
Mercedes’ Nico Rosberg on top again at Interlagos as he delivers repeat performance.
Mercedes drivers have a slightly different view on Massa's move to Williams team.