This chapter describes the constitutional and institutional set-up of horizontal intergovernmental coordination in Germany. It elaborates conditions of successful coordination, taking two examples: the changing working procedures of the minister presidents’ conference (MPK)—the peak intergovernmental council—during the pandemic as an example of regional coordination and the mechanisms of internal preference aggregation of the German Association of Counties (Deutscher Landkreistag—DLT) as an example of local coordination. Main factors that promote coordination are arenas that represent various interests, sequenced processes allowing to align interests across various dimensions subsequently, and a cooperative orientation among actors. It can be shown that Germany is in a beneficial position to achieve coordinated policymaking, mainly due to its cooperative institutions and culture. Still, recent developments and crises tend to undermine the engrained cooperative culture among political actors of the various central, regional and local units. In particular progressing societal disintegration and polarization incentivize political decision-makers to prioritize re-election considerations over cooperative problem-solving.