Yes, the early 300SE engines used a two plunger injection pump. The latter ones used a six cylinder injection pump like the pagoda. I owned a rare 1966, 300SE sedan (W108) chassis. This car had the M189 engine with a standard four speed transmission, and NO air suspension with the short wheelbase. Mercedes only made 2.700 in this configuration and they were all Euro Delivery. It was a blast to drive, fast and light with the aluminum block, short wheel base, no air suspension, no AC, roll-up windows, and standard transmission. It had the characteristic sound unique to those engines. The car eventually succumbed to the salty roads of the north since it was may daily driver. The engine was extracted and sold to a new owner somewhere in Chile for his 300SE cabriolet!