Die Nationalelf produced an exceptional result in their semi-final against Brazil, with Toni Kroos and Andre Schurrle scoring twice as Thomas Muller, Miroslav Klose and Sami Khedira also added to an astonishing scoreline.
|WORLD CUP SOCIAL HUB
|Keep up with all the latest news from Brazil and get involved in the debate on Twitter with our new World Cup Social Hub|
"We're hoping for the support of the Brazilians," the 49-year-old told reporters.
"The reaction we have got from them since the game has been amazing. We're looking forward to the game against another South American team. I think the players are really fired up for it.
"Everyone has been able to train, whether on the bikes recovering or working on the pitch."
Klose, who was part of the Germany team that lost the 2002 final to Brazil, also spoke of Sunday's clash, admitting he is desperate to lift the trophy.
"I know how bad it feels to lose a final," the 36-year-old Lazio striker said.
"We enjoyed the game against Brazil, but since the other semi-final our full concentration has been on the game against Argentina.
"The team spirit is fantastic, everyone has done very well in training, giving everything.
"I am full of confidence that we have a fantastic chance of winning."
Klose, who became the all-time leading World Cup goalscorer during the victory over Brazil, backed team-mate Thomas Muller - one goal short of current leader James Rodriguez - to win the Golden Boot for a second successive tournament.
"It would be great for Thomas to get the Golden Boot," he continued.
"But, like he said, he’s already got one."