| Mercedes-Benz M137 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1997–2002 |
| Layout | |
| Configuration | 60° V12 |
| Displacement | 5.8 L; 353.1 cu in (5,786 cc) 6.3 L; 381.9 cu in (6,258 cc) |
| Cylinder bore | 84 mm (3.31 in) 84.5 mm (3.33 in) |
| Piston stroke | 87 mm (3.43 in) 93 mm (3.66 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | SOHC 3 valves x cyl. |
| Compression ratio | 10.0:1 |
| Combustion | |
| Fuel system | Fuel injection |
| Fuel type | Gasoline |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 270 kW (367 PS; 362 hp) 326 kW (443 PS; 437 hp) |
| Specific power | 46.6 kW (63.4 PS; 62.5 hp) per litre 51.7 kW (70.3 PS; 69.3 hp) per litre |
| Torque output | 530 N⋅m (391 lb⋅ft) 620 N⋅m (457 lb⋅ft) |
| Chronology | |
| Predecessor | Mercedes-Benz M120 |
| Successor | Mercedes-Benz M275 |
The Mercedes-Benz M137 engine is a naturally aspirated, SOHC 60° V12 engine, with three valves per cylinder, 2 intake and 1 exhaust. It was built to replace the larger and heavier, yet more powerful, DOHC, four valves per cylinder, naturally aspirated, 6.0 L M120 V12 unit. The M137 was used briefly between 1998 and 2002 for the W220 S-Class (long wheelbase only) and C215 CL-Class.[1] The architecture is similar to M112 and M113 engines, and is designed to match the overall dimensions of a V8 unit with undersquare internal measurements. The crankcase was cast in a lightweight alloy with "Silitec" (silicon/aluminium) cylinder liners to save weight. The M137 is 80 kg lighter than its predecessor and features cylinder deactivation technology. Both displacement variants have 10:1 compression ratio.[2]
The M137 was replaced by the more powerful twin-turbocharged M275 engine.
- ^ "Mercedes-Benz M137 engine (1998-2002)". australiancar.reviews. Retrieved 8 January 2020.
- ^ "Mercedes-Benz M137 V12 engine". motor-car.net. Retrieved 8 January 2020.