Nico Rosberg set the quickest time of pre-season testing at Barcelona so far to top the second day of running at the Spanish track.
Lewis Hamilton set the morning pace on the first day of the final test of the pre-season at Barcelona, as McLaren continued to have trouble with its car.
McLaren looks set to debut its Honda-powered 2015 car on Sunday with an all-black livery, according to the Spanish sports daily Marca.
This year's Red Bull is probably the last 100 per cent Adrian Newey car, team boss Christian Horner has admitted.
If aesthetics mean anything, Ferrari will have a better year in 2015.
Susie Wolff performed some aero test work and control systems testing and team completed planned testing programme on schedule this morning.
Overall the team was very pleased with the outcome of the day.