is not able to reproduce the energetic ordering of the structural isomers correctly. In contrast, the db-MBE(2) yields highly accurate results when combined with a suitable embedding scheme. For the most accurate relaxed FDE-ft embedding, the mean and maximum errors in the relative energies amount to only 1.9 kJ/mol and 2.8 kJ/mol, respectively. A similar error is reached for the total interaction energies with mean and maximum errors of 1.5 kJ/mol and 2.7 kJ/mol, respectively. These errors of the db-MBE(2) are slightly lower than those found for the more expensive eb-MBE(3). Included are results from both the isolated MBEs ("iso") and the embedded MBEs using point-charge embedding ("PC") as well as using frozendensity embedding with the unrelaxed frozen densities of the isolated fragments ("FDE") and a relaxed frozen density obtained using freeze-and-thaw cycles ("FDE-ft"). Some data points might lie outside the shown energy range.