The OM656 is a turbocharged diesel engine produced by Mercedes-Benz since 2017. It was first introduced in the facelift W222 S-Class.[1]
| Mercedes-Benz OM656 | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 2017– |
| Layout | |
| Configuration | Straight six engine |
| Displacement | 2.9 L (2,927.8 cc) |
| Cylinder bore | 82 mm (3.23 in) |
| Piston stroke | 92.4 mm (3.64 in) |
| Cylinder block material | Aluminium alloy |
| Cylinder head material | Aluminium alloy |
| Valvetrain | DOHC 4 valves x cyl. with VVT |
| Compression ratio | 15.5:1 |
| Combustion | |
| Supercharger | BorgWarner's eBooster® electrically driven compressor |
| Turbocharger | Single-turbo |
| Fuel system | Common rail Direct injection |
| Fuel type | Diesel |
| Cooling system | Water cooled |
| Output | |
| Power output | 210–250 kW (282–335 hp) |
| Torque output | 600–700 N⋅m (443–516 lb⋅ft) |
| Chronology | |
| Predecessor | Mercedes-Benz OM642 |
Design edit
The OM656 is based on a modular design that is shared with other 4-cylinder and 6-cylinder, petrol and diesel engines.[2] It is the replacement to the previous V6,[3] in order to maintain the cost of production between different engines. The OM656 has dual overhead camshafts with variable valve timing, and uses AdBlue injection and exhaust gas recirculation to reduce emissions.[4] The cylinder walls are coated with arc sprayed steel whose increased porosity aids oil film strength to reduce friction.[5][6]
Models edit
| Engine | Power | Torque | Years |
|---|---|---|---|
| OM656 D29T R SCR | 210 kW (286 PS; 282 hp) at 3,400–4,600 rpm |
600 N⋅m (443 lb⋅ft) at 1,200–3,200 rpm |
2017–[7] |
| OM656 D29T SCR | 250 kW (340 PS; 335 hp) at 3,600–4,400 rpm |
700 N⋅m (516 lb⋅ft) at 1,200–3,200 rpm |
OM656 D29T R SCR edit
- 2017–2020 W222 S 350 d[8]
- 2018–2020 C257 CLS 350 d[9]
- 2018–2020 W213 E 350 d
- 2018–present W463 G 350 d[10]
- 2019–present V167 GLE 350 d
- 2020–present X167 GLS 350 d
- 2021–present W223 S 350 d
OM656 D29T SCR edit
- 2017–2020 W222 S 400 d[11]
- 2018–present C257 CLS 400 d 4MATIC[9]
- 2018–present W213 E 400 d 4MATIC[12]
- 2018-present W463 G 400 d
- 2019–present V167 GLE 400 d
- 2020–present X167 GLS 400 d
- 2021–present W223 S 400 d 4MATIC
References edit
- ^ Publishing, Last Gear. "Facelifted 2017 Mercedes-Benz S-Class to Debut New 3.0L Straight-Six Engines, 4.0L V8 Biturbo". Drive Mag. Retrieved 2018-07-03.
- ^ "New Modular Engine Family from Mercedes-Benz is Cleaner and More Powerful – Drive Safe and Fast". www.dsf.my. 30 October 2016. Retrieved 2018-07-03.
- ^ "Hallelujah: Mercedes is bringing back the straight-six". Autoweek. Retrieved 2018-07-03.
- ^ "Mercedes rolls out new generation V8, inline 4 and 6 cylinder engines - MercedesBlog". MercedesBlog. 2016-10-29. Retrieved 2018-07-03.
- ^ Orlove, Raphael. "The Inline-Six Engine Is Back For Mercedes-Benz". Jalopnik. Retrieved 2018-07-03.
- ^ "NANOSLIDE®: Mirror-smooth surface for less friction". www.group-media.mercedes-benz.com. Retrieved 2022-08-29.
- ^ New six-cylinder diesel engine (OM 656): Majestic long-distance athlete
- ^ "Mercedes-Benz E 400 d 4Matic All-Terrain Confirmed to Get OM 656 Engine". www.autoevolution.com. Retrieved 2018-07-03.
- ^ a b "Mercedes CLS pre-production (2017) ride review". CAR Magazine. Retrieved 2018-07-03.
- ^ Panait, Mircea (22 December 2018). "G 350 d Introduces OM 656 Turbo Diesel To 2019 Mercedes-Benz G-Class". autoevolution. Retrieved 24 December 2018.
- ^ "Mercedes to Show Off Six Appeal at Shanghai Show". WardsAuto. 2017-04-18. Retrieved 2018-07-03.
- ^ Panait, Mircea (2018-05-02). "Mercedes-Benz E 400 d 4Matic All-Terrain Confirmed to Get OM 656 Engine". autoevolution. Retrieved 2018-07-03.