Dumb article. Of course she's running for a fourth term.
The Christian Democrats (which are actually neither, but that is irrelevant) are due a massive loss next year. This is not just because of their policies, but also the natural pendulum swing between left and right which all politics seems to have. As it is traditional for the leader of the losing party(s) in Germany to resign, she'll ride the party down so her replacement isn't splashed with the crap caused by losing.
And if she wins, she wins.