Implementation details of the PW MP2 correlation energy in CPMD. Energy convergence against the PW wave function energy cutoff. Energy convergence versus the box volume for different treatments of the electrostatic couplings in the PW periodic setup. PW and (aug-)cc-pV5Z S22* interaction energies. Additional deviations between GTO and PW interaction energies against cardinal numbers and the number of electrons in the complexes. Figures of merit for the interpolation quality of various GTO extrapolations.