Having been forced to skip the first day of Formula 1 pre-season testing, Jenson Button marked the McLaren-Mercedes MP4-29's track debut by going quickest on day two at Jerez.

The British driver completed 43 laps to edge out day one pace setter Kimi Raikkonen by just over six tenths, while Williams' Valtteri Bottas, Nico Rosberg and Sergio Perez ensured Mercedes-powered cars took up four of the top five positions.

By contrast, Renault had a disappointing day with Red Bull Racing and Caterham suffering issues, while Scuderia Toro Rosso didn't make it out on track at all. So far Renault-powered cars have completed just 38 laps in two days, compared with Mercedes on 212 and Ferrari on 100.

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1. Jenson Button Britain McLaren-Mercedes 1min 24.165secs
2. Kimi Raikkonen Finland Ferrari-Ferrari 1min 24.812secs
3. Valtteri Bottas Finland Williams-Mercedes 1min 25.344secs
4. Nico Rosberg Germany Mercedes-Mercedes 1min 25.588secs
5. Sergio Perez Mexico Force India-Mercedes 1min 28.376secs
6. Esteban Gutierrez Mexico Sauber-Ferrari 1min 33.270secs
7. Marcus Ericsson Sweden Caterham-Renault 1min 37.975secs
8. Sebastian Vettel Germany Red Bull-Renault 1min 38.320secs