Khandro,
Thank you very much, I have learned something new. I found this interesting...
// Merkel realized at the time that this secret would eventually come out and would inevitably lead to Schäuble's downfall. She also knew that, if she wasn't careful, she could go down with him. After all, it was only logical that the general secretary of a party would have the confidence of the head of that party.
And so she wrote about it -- in what was widely described as a "Dear John" letter addressed to Kohl and published in the Frankfurter Allgemeine Zeitung newspaper on Dec. 22, 1999. In the letter she was very critical of Kohl, saying that the new generation of politicians in the CDU needed to distance themselves from him, in the same way that teenagers must distance themselves from their parents if they are to become adults. Even though Merkel had only told Schäuble about plans to publish the open letter the night before, Kohl was convinced that the missive had been published with Schäuble's foreknowledge and approval.
The scrap between Kohl and Schäuble, the pair that had formerly been bound with an invisible cord, toppled both of them off the pedestal on which they had formerly stood together. And there, waiting quietly in the wings, was Merkel. //
http://www.spiegel.de/international/germany/germany-s-schreiber-affair-the-scandal-that-helped-merkel-become-chancellor-a-640938.html