ABU DHABI, UAE - The Mercedes Formula 1 team hasn't scored a point in the three races since Lewis Hamilton made his decision to join the team in 2013 but the McLaren driver says the slump has only made him more determined.The 2008 Formula 1 world champion told reporters ahead of Sunday's 2012 Abu Dhabi GP: "It makes me even more driven to help them (Mercedes) score points."I'm very happy with the decision I made. It doesn't affect that. People do sometimes lose their way, even we have struggled and not scored points," added the 27-year-old Briton.GUNS BLAZINGHamilton, with McLaren all his F1 career, will replace Michael Schumacher at Mercedes when the 43-year-old German retires after a comeback lasting three years.The former Ferrari great hasn't scored for four races while team mate Nico Rosberg hasn't been in the top 10 since Singapore, the race before Hamilton was announced as his future team mate.By coincidence, Hamilton's replacement at McLaren - Mexican Sergio Perez - has not scored either in his previous three races for Sauber.Hamilton has said repeatedly he does not expect to be winning immediately for Mercedes in 2013 and was looking more to 2014, when new regulations and engines would be introduced."I already knew how big it was going to be," he said of the task. "I thought about it really hard and I could see how big it was."Perhaps it's growing, but as a task I'm really excited about it, excited to meet new people and to being in a different environment, and to mould myself into that environment."The McLaren driver is, mathematically, still in the 2012 title race by the slimmest of margins - 75 points behind with a total of 75 still to be won.To take the title he will have to win every race while Red Bull's championship leader and others fail to score another point.Hamilton, who won in Abu Dhabi in 2011 and has always qualified on the front row, said he would be racing with "all guns blazing" in any case.