Baden-Württemberg is very complicated. The point is that in Baden-Württemberg you have something like an open list because there's only one vote for the constituency seat. For the parties that had not gained constituency seats, the list is constructed in accordance with a percentage of the votes that the candidates have won in the constituencies. The most successful candidate for the Greens, for example, was the first who got one seat, and the second successful one, the second seat, and so on.
The point is that if you want, for example, to take in women's representation, the list is the best opportunity to force every party to give half of their seats to women. There is no enforceable quota in Germany. The quotas are all informal or voluntary commitments of the parties.
The party that first made this commitment was the Green Party. They have a quota of 50%, and they always have the biggest share of women. In Württemberg, where it's something like an open list, the Green Party has the biggest share of women in Parliament, but it's only 40%. In the other Länder, when there are lists, they have 50%.