Fitting Position: Intake Side. SL (R107) 500 SL (107.046) 241HP/177KW 1980/05-1981/12. SL (R107) 380 SL (107.045) 218HP/160KW 1980/09-1981/08. SL (R107) 380 SL (107.045) 204HP/150KW 1980/09-1985/08. SL (R107) 420 SL (107.047) 204HP/150KW 1986/01-1989/08.