The Hamburg defender was unceremoniously thrown out of the national team last month after a bust-up with coach Marcel Koller following a disagreement on the 32-year-old's role in the team.
Nevertheless, the Austrian, who recently ended a six-year stay in the Premier League with Wigan and West Brom, believes his compatriots have a chance against the Euro 2012 semi-finalists.
"We have caught up. Many [of our players] are from the Bundesliga. Germany seems unsettled," the defender told Bild.
"They [Germany] lack a figure like [Andrea] Pirlo from Italy. We are ready."
Scharner also revealed his disappointment at being omitted from the national set-up, but insisted that he would not be involved in any war of words.
"I'm sitting at home on the sofa, and being sad that I'm not going. I had wanted Germany as an opponent. It's a great attraction for us Austrians," he explained.
"I will produce no mud-slinging. I'll just check legally if [whether the life ban set by the Austrian FA] is even possible."
Austria welcome neighbours Germany in the second round of matches in World Cup qualifying Group C on Tuesday. Kick-off at the Ernst-Happel Stadion in Vienna is at 20:30CET.