Mercedes and Ferrari have both passed the mandatory FIA crash tests with their new F1 2013 cars, it has been reported.

According to German newspaper Auto Motor und Sport, the Mercedes F1 W04 will benefit from an 'ultra small' gearbox and heavily revised sidepods, adopting similar elements seen on the championship winning, Red Bull RB8.

The rear suspension has also been tweaked so that the geometry can be altered quickly to suit the ever fickle Pirelli tyres.

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Meanwhile, Ferrari's new challenger has also been given the all-clear, with Spanish daily sports, Mundo Deportivo revealing that it is 2 kilos heavier than the F2012 a result of the new minimum weight.

Thus far, only Sauber has confirmed officially that its new chassis has passed the required crash tests, with a message posted on Twitter before Christmas. The first winter tests start on February 5.