Mercedes-Benz OM646 engine

Mercedes-Benz OM646
Overview
Manufacturer Mercedes-Benz
Production 2002–2010
Layout
Configuration Inline-four engine
Displacement 2.1 L (2,148 cc)
Cylinder bore 88.0 mm
Piston stroke 88.3 mm
Cylinder block alloy Aluminium alloy
Cylinder head alloy Aluminium alloy
Valvetrain DOHC
Compression ratio
  • 18:1
  • 17.5:1 (DE22 LA EVO)
Combustion
Turbocharger Single-turbo
Fuel system Common rail
Fuel type Diesel
Chronology
Predecessor Mercedes-Benz OM611 engine
Successor Mercedes-Benz OM651 engine

The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz.

Design

The OM646 engine is sold under the 200 CDI and 220 CDI designation and features an electric fuel pump, exhaust gas recirculation, particulate filters,[1] and Euro 4 emission standard compliance (from 2003).[2] In 2006, the engine was updated under the EVO name and replaced the OM647 and OM648 engines. It features a reduced compression ratio of 17.5:1, a new turbocharger, and ceramic glow plugs for improved engine starts.[3]

Models

Engine Power Torque Years
OM646
DE22 LA R		 65 kW (87 hp)
@ 3,800 rpm		 220 N⋅m (162 lb⋅ft)
@ 1,400–2,500 rpm		 2003–2010
70 kW (94 hp)
@ 3,800 rpm		 250 N⋅m (184 lb⋅ft)
@ 1,400–2,600 rpm		 2006–2010
80 kW (107 hp)
@ 3,800 rpm		 290 N⋅m (214 lb⋅ft)
@ 1,600–2,600 rpm		 2003–2010
85 kW (114 hp)
@ 3,800 rpm		 2006–2010
90 kW (121 hp)
@ 4,200 rpm		 270 N⋅m (199 lb⋅ft)
@ 1,400–2,800 rpm		 2003–2010
OM646
DE22 LA		 65 kW (87 hp)
@ 3,800 rpm		 220 N⋅m (162 lb⋅ft)
@ 1,600–2,600 rpm		 2006–2009
80 kW (107 hp)
@ 3,800 rpm		 280 N⋅m (207 lb⋅ft)
@ 1,600–2,400 rpm
95 kW (127 hp)
@ 3,800 rpm		 305 N⋅m (225 lb⋅ft)
@ 1,200–2,400 rpm
105 kW (141 hp)
@ 4,200 rpm		 340 N⋅m (251 lb⋅ft)
@ 2,000 rpm		 2003–2004
110 kW (148 hp)
@ 3,800–4,200 rpm		 330 N⋅m (243 lb⋅ft)
@ 1,200–2,400 rpm		 2003–2010
OM646
DE22 LA EVO R		 100 kW (134 hp)
@ 3,800 rpm		 270 N⋅m (199 lb⋅ft)
@ 1,600–3,000 rpm		 2007–2009
340 N⋅m (251 lb⋅ft)
@ 2,000 rpm		 2006–2009
OM646
DE22 LA EVO		 125 kW (168 hp)
@ 3,800 rpm		 400 N⋅m (295 lb⋅ft)
@ 2,000 rpm

OM646 DE22 LA R

OM646 DE22 LA

OM646 DE 22 LA EVO R

OM646 DE 22 LA EVO

References

  1. ↑ Klose, Steane (2008-04-11). "Mercedes Benz reveals new range of four cylinder diesels". The Motor Report. Retrieved 2018-07-06.
  2. ↑ "Mercedes C200 CDI estate review | Autocar". www.autocar.co.uk. Retrieved 2018-07-06.
  3. ↑ "Mercedes-Benz OM646, OM647 and OM648 engines". australiancar.reviews. Retrieved 2018-07-06.
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