The German magazine Auto Motor und Sport claims that not every leading figure in the paddock supports Max Mosley's claim that the environmentally-friendly 'boost button' gizmos are good for the sport.

Renault's Flavio Briatore, already supported in his opposition by Ferrari vice president Piero Ferrari, is reportedly concerned that the cost of developing the system for 2009 is running into $20m.

He will apparently propose at the meeting that KERS is delayed until 2010.

Auto Motor und Sport said Honda, BMW and Williams are, however, in favour of introduction next year, while McLaren-Mercedes and Toyota sit on the fence.

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