Mercedes-Benz W108 - Later Models

Later Models

The 300SEL 6.3 was a special model and production of the fuel-thirsty M100 engines was limited. As new models were being developed the export markets had to be considered, and the United States in particular. The American car production by the late 1960s has largely switched to Big-block V8 powered cars, and Mercedes-Benz had to produce its own eight-cylinder engine to stay competitive.

The new engines arrived in late 1969, and the first was the 3499 cc M116 V8 with Bosch electronic fuel injection, producing 200 h.p, was fitted to the W109, and shown on the Frankfurt Auto Show. The car was christened as the 300SEL 3.5. Its performance included a top speed of 200 km/h (124 mph) and 0–100 km/h in 10 seconds. During summer of 1970, the M116 was added to the W108 lineup on both regular and LWB, the 280SE 3.5 and the 280SEL 3.5 respectively.

The next year saw further retirements of the Pontons, the 2-door W111s and the W113 pagoda roadsters were phased out of production. This left the W108 and W109 as the sole survivors of the ageing family. However the arrival of the big-block 4520 cc 225 hp (168 kW) M117 engine allowed for a final set of vehicles to be launched in the spring of 1971, the W108 280SE 4.5 and 280SEL 4.5 and the W109 300SEL 4.5. This, was destined solely for the US market. Performance improved, top speed - 205 km/h, 0-100 - 9.5 seconds.

However as the mainstream V8 models were being introduced, production was already drawing to a close, the straight-six 300SEL was finished in January 1970, and in April 1971 the 280SEL followed. The 280SE 3.5 and 280SEL W108s were retired in summer of 1972. In September the last 300SEL 3.5 and the 6.3 rolled off the conveyors. A month later, the final 300SEL 4.5 ended the W109's output, and in November saw the final models of the W108 280SE and 280SEL 4.5s end a seven-year history.