McLaren driver Jenson Button says there will be no excuses for him not winning a second Formula One world title this season.
The Brit, who took the F1 drivers' crown in 2009, is entering his third year at the Woking-based team and believes he is now in the perfect environment to launch another title challenge.
Last year Button finished second in the final standings, winning a total of three races and accumulating 43 more points than team-mate Lewis Hamilton.
And the 32-year-old is aiming to go one better in 2012, stating that there is no reason why he should not be a double world champion at the end of the campaign.
"My first year at McLaren I initially thought would be very tough, moving to a new team, but it was a pretty good year really, a very good learning year," Button said.
"Last year I felt I did the best with the car I had, that I really grew with the team, felt a big part of McLaren, not just a driver, but a big part of the team. So there are no excuses this year. I feel we have everything.
"The relationship I have with my engineers and mechanics is very good, and there's a really good understanding there.
"There's nothing to fall back on and say, 'this is the reason why we didn't win in 2012'.
"So I'm very happy now with my position within the team, and to win the world championship with McLaren would be amazing.
"To win anything would be amazing, but with a team you've been with for two years, have such a good relationship with and feel a big part of after such a short period, it would mean more than just arriving and driving the best car."
Button will return to the cockpit of the MP4-27 on Thursday for two more days of testing at Barcelona's Circuit de Catalunya.
McLaren have not been regulars near the top of the timesheets during pre-season testing so far, but Button is confident the new car will be able to challenge at the front of the grid come the opening race in Australia.
He added: "We're on target. There's nothing to say we're one-and-a-half seconds quicker than anyone, but then there's also nothing to say we're not fast.
"The car feels nice to drive, I feel very comfortable in it and it does everything you expect it to. It's just developing it now for the first race.
"But it's good to be back. I feel very confident in my ability, with my input into the car and the team feeling I'm playing my part. It's all moving in the right direction, so I'm happy."