CREATE TABLE table_name_64 (years VARCHAR2, engine_code VARCHAR2, model VARCHAR2)

During which years was the Model 318td (diesel) with the Engine code of m47d20 manufactured?
SELECT years FROM table_name_64 WHERE engine_code = "m47d20" AND model = "318td (diesel)"
SELECT "years" FROM "table_name_64" WHERE "318td (diesel)" = "model" AND "engine_code" = "m47d20"