There’s a federal election coming up in 2017. Merkel’s junta is in panic mode. That won’t help her. Besides, she has lied about taxes before.
I see you beat me to it. It'll buy a few votes maybe, but not enough.
Already some CDU twerps are openly calling for a possible coalition with the AfD. They should be lucky if the AfD would consider a coalition with them. (OK, that's not realistic - yet.)