The captain of the national side says success will depend on each player sacrificing personal interests in favour of the greater good of the collective
Joachim Low's side have endured a decade of near misses in major tournaments, having finished third in the World Cup in 2006 and 2010, suffered defeat in the final of Euro 2008 and reached the last four of Euro 2012.
"We have the punch for the title," he told Bild.
"We only need to consider one thing: that the talent and ego of every individual must serve the team.
"I don't want to finish in the semi-finals or go to Brazil to soak up the sun. I have a clear goal: that is the greatest possible success - the World Cup trophy.
"We have to work especially on our defence and have conceded too many goals and allowed too many good chances.
"We must pay more attention to how the defence dropped. The whole team needs to."
Coach Joachim Low was handed a contract extension until 2016 earlier this season and Lahm is delighted that his working relationship with the 54-year-old will continue.
"The fact is that he has a contract and we work together very well as a team. He always prepares us very well tactically."