From 1999 to 2007, the 2.7-liter 5-cylinder in-line Mercedes OM612 engine was manufactured and fitted to well-known concern models like the W203, W210, W163, and Geléewagen. This diesel unit had an AMG version with a 3.0-liter capacity and 230 horsepower.
The diesel R5-family comprises OM617, OM602, OM605, OM612, and 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
Increased camshaft wear is the issue with the series’ five-cylinder diesel engines.
The timing chain, which has a resource of about 200–250 thousand kilometers, is also used here for brief periods of time.
Here, the boost pressure sensor and injector wiring frequently burn out electrically.
If the refractory washers are not replaced when disassembling the nozzles, they will quickly coke.
This engine’s remaining malfunctions are all related to Common Rail fuel equipment.
Modification OM 612 DE 27 LA: 5-cylinder, 2685 cm3, CDI II generation, bore and stroke of 88 and 88.3 mm, respectively.
| 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, CDI II generation, bore and stroke of 88 and 97 mm, respectively.
| Car model | Power at (rpm) | Torque at (rpm) |
|---|---|---|
| C 30 CDI AMG (W / S / CL 203) | 170 kW (231 hp) @ 3800 | 540 Nm @ 2000 |