Mark Webber explains F1 KERS and DRS [video]
Mark Webber explains the Kinetic Energy Recovery System (KERS) and Drag Reductions System (adjustable rear wing) that will be used in F1 this year.
Mark Webber explains F1 KERS and DRS [video]
![Mark Webber explains F1 KERS and DRS [video]](https://i.ytimg.com/vi/7t5IrElFCyA/default.jpg)
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