The 2.7-liter 5-cylinder in-line Mercedes OM612 engine was produced from 1999 to 2007 and installed on such popular concern models as the W203, W210, W163 and Geländewagen. There was an AMG version of this diesel unit with a volume of 3.0 liters and a power of 230 hp.
The diesel R5-family includes: OM617, OM602, OM605, OM612, OM647.
Specifications
| Production years | 1999-2007 |
| Displacement, cc | 2685 |
| Fuel system | Common Rail |
| Power output, hp | 156 – 170 |
| Torque output, Nm | 330 – 400 |
| Cylinder block | cast iron R5 |
| Block head | aluminum 20v |
| Cylinder bore, mm | 88 |
| Piston stroke, mm | 88.3 |
| Compression ratio | 18.0 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | yes |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.5 |
| Fuel type | diesel |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for Mercedes C270 CDI 2002) — city — highway — combined |
9.7 5.1 6.8 |
| Engine lifespan, km | ~350 000 |
| Weight, kg | 215 |
The engine was installed on:
- Mercedes C-Class W203 in 2000 – 2007;
- Mercedes CLK-Class C209 in 2002 – 2005;
- Mercedes E-Class W210 in 1999 – 2003;
- Mercedes G-Class W463 in 2002 – 2006;
- Mercedes ML-Class W163 in 1999 – 2005;
- Mercedes Sprinter W901 in 2000 – 2006;
- Jeep Grand Cherokee 2 (WJ) in 2002 – 2004.
Disadvantages of the OM612 engine
- The problem with 5-cylinder diesel engines of the series is increased camshaft wear.
- The timing chain also serves here for a short time, its resource is approximately 200 – 250 thousand km.
- Electrically, the wiring of the injectors and the boost pressure sensor often burn out here.
- Nozzles quickly coke if the refractory washers are not replaced when dismantling them.
- All remaining breakdowns of this engine are associated with Common Rail fuel equipment.
Modification OM 612 DE 27 LA: 5-cylinder, 2685 cm3, bore and stroke 88 and 88.3 mm, respectively, generation CDI II generation.
| Car model | Power at (rpm) | Torque output at (rpm) |
|---|---|---|
| Sprinter 216 CDI, 316 CDI, 416 CDI, 616 CDI (W 901-905) |
115 kW (156 hp) at 3800 | 330 Nm at 1400-2400 |
| G 270 CDI (W 463) | 115 kW (156 hp) at 3800 | 400 Nm in 1800-2400 |
| ML 270 CDI (W 163) | 120 kW (163 hp) at 4200 | 370 Nm at 1600-2800 with MT |
| 400 Nm at 1800-2600 with AT | ||
| C 270 CDI (W / S 203) | 125 kW (170 hp) at 4200 | 370 Nm at 1600-2800 with MT |
| 400 Nm at 1800-2600 with AT | ||
| 400 Nm in 1800-2800 | ||
| CLK 270 CDI (C 209) | 125 kW (170 hp) at 4200 | 400 Nm at 1800-2800 with MT |
| 400 Nm at 1800-2600 with AT | ||
| E 270 CDI (W / S / VF 210) | 125 kW (170 hp) at 4200 | 370 Nm at 1600-2800 with MT |
| 400 Nm at 1800-2800 with AT |
Modification OM 612 DE 30 LA: 5-cylinder, 2950 cm3, bore and stroke 88 and 97 mm, respectively, generation CDI II generation.
| Car model | Power at (rpm) | Torque at (rpm) |
|---|---|---|
| C 30 CDI AMG (W / S / CL 203) | 170 kW (231 hp) @ 3800 | 540 Nm @ 2000 |
The motor is so good except the fuel system it’s so sensitive should have inverted a similar model with an injector pump.