Development was rapid:
The first development system of KERS in 2007 weighed 107 kg, and achieved an energy efficiency of 39%. By 2009, it was at 25.3 kg and 70% efficiency. By 2012, the system weighed less than 24 kg and achieved 80% efficiency.
As the 2014 season approached, cooperation between MERCEDES AMG PETRONAS and Mercedes-Benz Cars intensified. Today, key areas of cooperation are: