Mercedes-Benz M116 engine

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Mercedes-Benz M116 Engine
M116.980 engine in 1970 Mercedes-Benz 280 SE 3.5 (US model).jpg
3.5 litre, US-spec M116.980 in a 280 SE 3.5 Coupé
Manufacturer Mercedes-Benz
Production 1969–1991
Combustion chamber
Configuration 90° V8 engine
Displacement 3.5L
Cylinder block alloy Cast iron 1969-1978
Aluminum 1978-1991
Cylinder head alloy Aluminum
Valvetrain SOHC
Fuel type
Oil system Wet sump
Cooling system Water-cooled
Predecessor Mercedes-Benz M100 engine
Successor Mercedes-Benz M119 engine

The Mercedes-Benz M116 was a series of Gasoline automotive V8 engine made by Mercedes-Benz between 1969 and 1991. All models were a Single overhead camshaft design with 2 valves per cylinder and featured Bosch Jetronic Fuel injection. These engines were introduced as smaller displacement alternatives to the Mercedes-Benz M117 engine, however they shared few common parts.


The original M116 engine 116.980 was introduced August 1969 in the 300SEL 3.5. It featured 9.5:1 compression with 200 PS (150 kW; 200 hp) @ 5800rpm and 286 N·m (211 lb·ft) @ 4000rpm. This was enough to propel the 1,575 kg (3,472 lb) saloon to a top speed of 200 km/h (124 mph). This engine and its twin, the 116.981 remained in production until 1980 when it was replaced by its larger 3.8 litre variant.

  • Bore x Stroke: 92mm x 65.8 mm Displacement 3499cc



The 116.960 engine was introduced in 1979 featuring 8.3:1 compression with 158 PS (116 kW; 155 hp) @ 4750rpm and 266 N·m (196 lb·ft) @ 2750rpm. This engine reached North America later for the 1981 380SL. There were 116.961, 116.962, and 116.963 versions of this engine. Early models came with a single row timing chain until 1983 and were plagued with chain failure problems which Mercedes-Benz would repair free of charge. All 1984+ models came with a double row timing chain from the factory to prevent this failure, however this engine was replaced for the 1986 model year by its larger 4.2 litre variant.

  • Bore x Stroke: 88mm x 78.9mm Displacement 3818cc



The 116.965 engine was introduced in 1986 for the revised S-Class. It featured 9.0:1 compression and had from 204-231 PS (150-170 kW; 201-228 hp) depending on year and export market. All engines were mated to the Mercedes-Benz 4G-Tronic transmission. In North America, this engine was only used in 420SEL models featuring 204 PS (150 kW; 201 hp) @ 5200rpm and 310 N·m (229 lb·ft) @ 3600rpm. This engine was used until 1991 when it was replaced by the newer 4.2L Double overhead camshaft Mercedes-Benz M119 engine with which it shares no parts.

  • Bore x Stroke: 92mm x 78.9mm Displacement 4196cc