Step #4: Attacking the 2014 regulations much earlier than the competition
If there is one guy who is a master at deciphering rule changes, then it has to be Ross Brawn. He did that with the double diffuser in the Honda/Brawn GP and when he was given the job to take Mercedes to the top in F1, he again went about it in a precise and eerily similar manner.
The regulations for the 2014 season were set in stone by 2011, and it was during that time that Brawn assigned resources to work on the car for the 2014 season. While Merc's competitors, be it Ferrari, Mclaren or Red Bull, were busy working on cars for the respective seasons, Brawn had already earmarked Geoff Willis and Aldo Costa to work on the car for the new regulations.
What it did was give Mercedes a huge head start compared to the rest of the grid. The result was a car which was, at times, a second a lap faster than its closest challenger.