The Kers system gives drivers a burst of extra power at the push of a button in the cockpit.
The model will be fitted with a Kers system, short for Kinetic Energy Recovery System, that has been developed by the Formula 1 industry.
There's a nod to eco-friendliness with relatively low emissions, but the hybrid component mostly powers a KERS system that fills out the few weak points in the torque band.
The Kers system stores energy that would otherwise be wasted as heat during braking, then reapplies it during acceleration to provide a boost in power, controlled from the cockpit by the driver.
Of all the new regulations being implemented for 2009, the Kinetic Energy Recovery System (Kers) presents constructors with the biggest test.
New regulations for 2009 will see the return of slick tyres, the introduction of the new kinetic energy recovery system (Kers) and aerodynamic alterations.
Slick, untreaded tyres will also be reintroduced after 11 years on grooved tyres, and teams have the option of employing a kinetic energy recovery system (Kers).
But after benefiting from his Kers power-boost system to contest the lead with Webber and Barrichello going into the first corner, Hamilton was tapped from behind by the eventual winner and got a puncture.
Hamilton's fast start, made possible by the Kers power-boost system on his McLaren, catapulted him ahead of Vettel on the run down to the first corner and was crucial in deciding the result of the race.
Red Bull will accept that they are likely to get passed by a McLaren or Kimi Raikkonen's Ferrari, who have the benefit of the kinetic energy recovery system (Kers) power boost on the run down to the first corner.
This season's cars will adopt a number of technical changes including the adoption of moveable rear wings as well as the return of the Kers power-boost system, which had been voluntarily suspended last season, as used by McLaren in the 2008 season.
The new developments include a switch to slick tyres from the grooved ones of recent years, and the introduction of the kinetic energy recovery system (Kers), which stores energy recovered from the rear axle during braking and converts it to supply a brief power boost.
They include changes to the aerodynamics, the re-introduction of slick, untreaded tyres after 11 years with grooved rubber and the potential use of a kinetic energy recovery system (Kers), which stores energy that would have been dissipated during braking and reapplies it while the car is accelerating.
The technology in question is KERS (kinetic energy recovery system) for capturing and storing the car's braking energy instead of wasting it as heat.
Hamilton, 24, said the Kers (Kinetic Energy Recovery System) power-boost system - which Ferrari are also using - proved "anything can happen" and the Briton is optimistic he can replicate the pace he found in Hungary.
Dubbed KERS, for Kinetic Energy Recovery System, the powerplant designed to recapture energy lost during braking or coasting.
They added that they will be focusing on the development of slick tyres and will introduce Kers as and when they have a system that can improve performance.
And Petrov, whose Friday was punctuated by spins, blamed his struggles on adapting to the Kers energy recovery and power-boost system, of which Heidfeld has experience from his time at BMW Sauber in 2009.
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Williams, Ferrari and BMW Sauber are also doubtful about starting the season with Kers in place, while McLaren could only confirm the system was not causing them any problems.
On certain circuits and with some drivers, the speed gain from KERS can be cancelled out by the additional weight of the system.
At the Hungarian Grand Prix in 2009, Lewis Hamilton achieved the first historic victory for a Formula 1 vehicle featuring KERS hybrid technology in the form of the Mercedes-Benz KER System.
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