MERCEDES AMG PETRONAS continued its 2015 winter testing programme today at the Circuito de Jerez, with Lewis Hamilton taking the wheel of the F1 W06 Hybrid for the second of four days' running at the Spanish circuit. Lewis' best time of 1:22.490 from 91 laps put him fourth on the time sheets.

Lewis emerged for his first run at precisely 09:00 CET, completing 91 laps before lunch across a series of long runsFurther running was curtailed by investigations into the cause of a water leakMercedes-Benz Power Units today completed a total of 865 km between the three teams presentThe team will now work to ensure the car is ready for a return to the track tomorrow morning, with Nico Rosberg taking the wheel

Lewis Hamilton That was a satisfying day. We did a lot of laps and I got a feel for the car quite quickly. We're in the first days of testing so it never feels that great as the car is at the worst it will be all season. But it feels the same as it did last year which is a good thing. A little more downforce maybe but otherwise it handles exactly the same. The balance obviously wasn't perfect as we're not working on setup yet, so it could be a lot better. But the priority right now is to put in the laps, not set fast times, and there were lots of positives today. We got good mileage and hopefully we'll get even more in the next two days.

Testing isn't the exciting part as a driver - I live to go racing. But this is where you build your foundations for the year and we're all working hard to understand the car. Everything from drivability to tyres you have to learn now to stand you in good stead for the season. You can't get excited at this point as there's a long way to go before Melbourne but there's a really good energy in the team. Everybody is feeling positive and working hard but we're basing nothing on last year. We start again with the same aim as everyone else - to win. I can't wait to get to that first race.