Type Sensor, oil temperature. Spanner Size 19. Weight 0.026 kg. Net weight 0.020 kg. SMART FORTWO Cabrio (451) 0.8 CDi (451.401) Convertible Diesel 08/2009 on RWD 6 54 40. SMART FORTWO Coupe (451) 0.8 CDi (451.301) Coupe Diesel 08/2009 on RWD 6 54 40.