Mercedes Benz Classics: Owners Operation, Service, and Repair Workshop Manuals

Mercedes M116 M117 Engine Manual

The Mercedes Benz M116 Engine was produced from 1969 to 1991

The Mercedes Benz M117 Engine was produced from 1971 to 1992


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Mercedes Benz M116 M117 Engine Repair Manual
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Mercedes M116 Engine 1969-1991

The Mercedes-Benz M116 was automotive V8 engine made in several versions by Mercedes-Benz between 1969 and 1991. All models were gasoline powered, and utilized a single overhead camshaft with 2 valves per cylinder and Bosch Jetronic fuel injection. The larger M117 V8 followed, introduced initially in the US market.

The original M116 engine 116.980 was introduced August 1969 in the 300SEL 3.5. It featured 9.5:1 compression with 200 PS (147 kW; 197 hp) at 5,800 rpm and 286 Nm (211 lb.ft) at 4,000 rpm. This was enough to propel the 1,575 kg (3,472 lb) saloon to a top speed of 205 km/h (127 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: 92 mm × 65.8 mm (3.62 in × 2.59 in) Displacement 3.5 L (3,499 cc)

Mercedes M116 4.2 Liter Engine Parts Diagram

Mercedes M117 Engine 1971-1992

The Mercedes-Benz M117 is an OHC (overhead cam), 2 valve per cylinder V8 engine made in several versions by Mercedes-Benz between 1971 and 1992.

In the late 1980s, the first of a handful of fully re-engineered AMG 560 SEC 6.0 “Wide-Body” Coupes fitted with the ultimate development of the already legendary M117/9 V-8 engines appeared in several Japanese motor shows. The engines were now fully developed to 6.0-liters with radically improved cam and ignition timing on the quad-cam, four-valve cylinder heads. Massive increases in bhp were achieved but more impressive was the fact that these machines now produced more than twice the torque and at 1/2 the rpm of the original MB Factory design. The result was un-heard of performance in an utterly reliable overall package that came with the same warranty as provided new by the MB Factory. Such performance and utter exclusivity came at a steep cost.

Application Survey of Mercedes Benz M116 Engines

Years Model Chassis Engine Market
1979–1985 380 SE W126.032 M116.963 3.8 L V8  
1980–1985 380 SEL W126.033 M116.963 3.8 L V8  
1981–1985 380 SEC W126.043 M116.963 3.8 L V8  
1985–1991 420 SE W126.034 M116.965 4.2 L V8 N/A in US
1985–1991 420 SEL W126.035 M116.965 4.2 L V8  
1985–1991 420 SEC W126.046 M116.965 4.2 L V8 N/A in US

M116 3.5

The original M116 engine 116.980 was introduced August 1969 in the 300SEL 3.5. It featured 9.5:1 compression with 200 PS (147 kW; 197 hp) at 5,800 rpm and 286 Nm (211 lb.ft) at 4,000 rpm. This was enough to propel the 1,575 kg (3,472 lb) saloon to a top speed of 205 km/h (127 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: 92 mm × 65.8 mm (3.62 in × 2.59 in) Displacement 3.5 L (3,499 cc)

Application:

  • 1971-1980 Mercedes-Benz C107
  • 1971-1980 Mercedes-Benz R107
  • 1970-1972 Mercedes-Benz W108
  • 1969-1972 Mercedes-Benz W109
  • 1970-1971 Mercedes-Benz W111
  • 1973-1980 Mercedes Benz W116

M116 3.8

The 116.960 engine was introduced in 1979 featuring 8.3:1 compression with 158 PS (116 kW; 156 hp) at 4,750 rpm and 266 Nm (196 lb.ft) at 2,750 rpm. 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, changing the timing chain to a dual row thus resolved the problem making these engine as durable and reliable as any other Mercedes V8. 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: 88 mm × 78.9 mm (3.46 in × 3.11 in) Displacement 3.8 L (3,818 cc)

Application:

  • 1980-1982 Mercedes-Benz C107
  • 1980-1985 Mercedes-Benz R107
  • 1979-1985 Mercedes-Benz W126

M116 4.2

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) at 5,200 rpm and 310 Nm (229 lb.ft) at 3,600 rpm. 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: 92 mm × 78.9 mm (3.62 in × 3.11 in) Displacement 4.2 L (4,196 cc)

Application:

  • 1986-1989 Mercedes-Benz R107
  • 1986-1991 Mercedes-Benz W126

Application Survey of Mercedes Benz M117 Engines

Years Model Chassis Engine Market
1979–1985 500 SE W126.036 M117.963 5.0 L V8 N/A in US & AU
1980–1985 500 SEL W126.037 M117.963 5.0 L V8  
1980–1985 500 SEC W126.044 M117.963 5.0 L V8  
1985–1991 500 SE W126.036 M117.965 5.0 L V8 N/A in US
1985–1991 500 SEL W126.037 M117.965 5.0 L V8 N/A in US
1985–1991 500 SEC W126.044 M117.965 5.0 L V8 N/A in US
1985–1991 560 SEL W126.039 M117.968 5.5 L V8  
1985–1991 560 SEC W126.045 M117.968 5.5 L V8  
1988–1991 560 SE W126.038 M117.968 5.5 L V8 N/A in US & AU
  • M117.963 5.0 L V8
  • M117.965 5.0 L V8
  • M117.968 5.5 L V8

Application:

  • 280 SE, SEL 4.5 (W108)
  • 300 SEL 4.5 (W109)
  • 450 SE, SEL (W116)
  • 450 SL, SLC (R107/C107)
  • 450 SLC 5.0 (C107)
  • 500 GE (W463)
  • 500 SE, SEL, SEC (W/V/C126)
  • 500 SL, SLC (R107/C107)
  • 560 SE, SEL, SEC (W/V/C126)
  • 560 SL (R107)