user: Question: Which Engine has a Model of S320 CDI?
Columns: ['Model', 'Engine', 'Cyl.', 'Power', 'Torque']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['S280', '2.8 18V', 'V6', 'PS (kW; hp)', 'N·m (lb·ft)']
SQL:

assistant: SELECT "Engine" FROM "Table" WHERE "Model" = 'S320 CDI';