The 2012 season will is see a total of six former world champions line-up on the grid, with Raikonnen and Vettel being joined by Mercedes' seven-time winner Michael Schumacher, Ferrari's two-time champion Fernando Alonso and McLaren's championship-winning duo of Jenson Button and Lewis Hamilton.
In another major driver move, two-time world champion Alonso left Renault for Ferrari where he will line-up alongside Massa, happily returned to the grid after his horrific crash in Hungary last July.
In addition, the Controller can delay restart or sequence re-start of appliances to prevent them from coming-back on line simultaneously after a power outage, which can also cause unstable grid conditions.