The Mercedes M112 E37 engine was intended for large cars and became the largest in the M112 family. Compared to the E32, in the E37 the cylinder block has been changed to accommodate a larger piston diameter of 97 mm.
The V6-family includes: M112 E24, M112 E26, M112 E28, M112 E32, M112 E37, M272 E25, M272 E30, M272 E35, M276 DE30, M276 DE35.
The cylinder heads are similar to those used on the base M112 E32: with one camshaft (SOHC) and three valves per cylinder: two intake, one exhaust. The diameter of the intake valves has been increased to 38 mm, exhaust 43 mm. The variable valve timing system, hydraulic lifters, as well as a variable length intake manifold are still used.
The timing drive uses a chain, the average resource of which is about 200 thousand km. Bosch Motronic ME 2.0 engine management system.
Specifications
| Production years | 2002-2008 |
| Displacement, cc | 3724 |
| Fuel system | distributed injection |
| Power output, hp | 231 – 245 |
| Torque output, Nm | 345 – 350 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 18v |
| Cylinder bore, mm | 97 |
| Piston stroke, mm | 84 |
| Compression ratio | 10.0 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.5 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for ML350 W163) — city — highway — combined |
19.4 11.0 14.1 |
| Engine lifespan, km | ~360 000 |
| Weight, kg | 160 |
Disadvantages of the M112 E37 engine
- The signature failure of this series of engines is the destruction of the crankshaft pulley.
- The remaining engine problems are somehow related to increased oil consumption.
- Due to contamination of the crankcase ventilation, grease creeps out from under the gaskets and seals.
- The main cause of oil burnout here is usually in hardened valve stem seals.
- Lubrication leak points are also the oil filter housing and heat exchanger.
