Sebastian Vettel has insisted that Red Bull can't expect to simply continue the success it has enjoyed for the past two seasons when the 2012 F1 campaign kicks off.
The Milton Keynes-based team has taken championship honours for the past two years with Vettel taking back-to-back drivers titles – the latter in dominant fashion in 2011.
The German is set to go into the new campaign as the overwhelming favourite to make it three title wins on the bounce but he warned that Red Bull can't take success for granted and would need to work hard to stay ahead of the chasing pack.
"We will try to win again," he told Auto Hebdo
. "But the beauty of this sport is that before a new season, all the points counters are reset. It is up to Red Bull to build a competitive chassis and Renault to produce a powerful and reliable engine. There is no certainty; nothing is sure about this success continuing."
Vettel added that the success enjoyed in 2011 hadn't come easily for the team, with a continued push to see off McLaren and Ferrari as the season went on.
"All year long we were pushing to keep the car at the level that it was," he said. "McLaren were pushing massively and I think at the end we were pretty even. I don't think that one car really had the edge."