"The ECB hasn't made any decisions yet," Merkel said at a news conference in Berlin, asked about expectations the European Central Bank will announce a government bond-buying programme on Thursday. "There's been a lot of speculation (about that).

"Secondly, the ECB is independent. I can only repeat what I said on Monday evening that ... it's important for me, as a politician, that all signals have to be avoided that could be perceived as weakening the necessity for structural changes and closer economic-political cooperation in euro zone countries."

"That definitely has to be countered. We'll have to wait and see about everything else," she said.

(Reporting by Sabine Siebold; Writing by Erik Kirschbaum, Stephen Brown and Madeline Chambers; Editing by Stephen Brown)