Now that both the FDP and the Greens have said that they want new elections, the CDU only needs to go along (and seems open to it). I think it's unavoidable at this point and Ypsilanti will also back it, perhaps postponing the decision a bit to let the election take place in early February.
More here.
I did suspect your math is wrong somewhere :-)
What remains to be seen is whether the Greens would vote for new elections without the SPD or not. I think that would say a lot about the future (for example, the viability of the hitherho unthinkable black-Green with Koch). *Lunatic*, n. One whose delusions are out of fashion.
Then again, he does so noting that Koch again "did it": he declared that "now the way is open again for highway and airport expansions", which is no way to get Greens into a Jamaica coalition [ = CDU + FDP + Greens]. *Lunatic*, n. One whose delusions are out of fashion.
