Symmetry-adapted perturbation theory (SAPT) has been used to investigate the intermolecular potential energy surface of CH3CN-CO2. A SAPT computation was performed for approximately 200 geometrical configurations using both a coarse grid in the five intermolecular coordinates and selected representative cuts. Four near-local minima are located on the potential energy surface. The deepest of these is -2.90 kcal/mol.