Mercedes-Benz OM646 engine explained

Mercedes-Benz OM646
Manufacturer:	Mercedes-Benz
Production:	2002–2010
Predecessor:	Mercedes-Benz OM611 engine
Successor:	Mercedes-Benz OM651 engine
Configuration:	Inline-four engine
Displacement:	2148cc
Bore:	88mm
Stroke:	88.3mm
Block:	Cast iron
Head:	Aluminium alloy
Valvetrain:	DOHC
Compression:	17.5:1 (DE22 LA EVO), 18.0:1
Turbocharger:	Single
Fuelsystem:	Common rail
Fueltype:	Diesel
Coolingsystem:	Water cooled
Power:	NaN0NaN0
Torque:	NaN0NaN0
Emissions Level:	Euro 4
Emissions Control:	EGR, DPF

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 engine. 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	650NaN0 @ 3,800 rpm	2200NaN0 @ 1,400–2,500 rpm	2003–2010
	700NaN0 @ 3,800 rpm	2500NaN0 @ 1,400–2,600 rpm	2006–2010
	800NaN0 @ 3,800 rpm	2700NaN0 @ 1,600–2,600 rpm	2003–2010
	850NaN0 @ 3,800 rpm	2900NaN0 @ 1,600–2,600 rpm	2006–2010
OM646 DE22 LA R	900NaN0 @ 4,200 rpm	2700NaN0 @ 1,400–2,800 rpm	2003–2010
OM646 DE22 LA	650NaN0 @ 3,800 rpm	2200NaN0 @ 1,600–2,600 rpm	2006–2009
	800NaN0 @ 3,800 rpm	2800NaN0 @ 1,600–2,400 rpm
	950NaN0 @ 3,800 rpm	3050NaN0 @ 1,200–2,400 rpm
	1050NaN0 @ 4,200 rpm	3400NaN0 @ 2,000 rpm	2003–2004
OM646 DE22 LA	1100NaN0 @ 3,800–4,200 rpm	3300NaN0 @ 1,200–2,400 rpm	2003–2010
OM646 DE22 LA EVO R	1000NaN0 @ 3,800 rpm	2700NaN0 @ 1,600–3,000 rpm	2007–2009
		3400NaN0 @ 2,000 rpm	2006–2009
OM646 DE22 LA EVO	1250NaN0 @ 3,800 rpm	4000NaN0 @ 2,000 rpm

OM646 DE22 LA R

• 2003–2006 W211 E200 CDI
• 2003–2007 W203 C200 CDI
• 2003–2010 W639 Vito 109 CDI, 111 CDI, 2.0 CDI
• 2008–2010 CL203 CLC200 CDI
• 2003-2009 Chrysler PT Cruiser

OM646 DE22 LA

• 2002–2006 W211 E220 CDI
• 2004–2007 W203 C220 CDI
• 2003–2010 W639 Vito 115 CDI, 2.2 CDI
• 2005–2010 C209 CLK220 CDI
• 2006–2009 W906 Sprinter 209-516 CDI
• 2008–2010 CL203 CLC220 CDI
• 2010–2013 Vito (Chinese market; known as OM646 980)
• 2003–2009 Chrysler PT Cruiser

OM646 DE 22 LA EVO R

• 2006–2009 W211 E200 CDI
• 2007–2009 W204 C200 CDI

OM646 DE 22 LA EVO

• 2006–2009 W211 E220 CDI
• 2007–2009 W204 C220 CDI

Notes and References

1. News: Mercedes Benz reveals new range of four cylinder diesels. Klose. Steane. 2008-04-11. The Motor Report. 2018-07-06. en-US.
2. Web site: Mercedes C200 CDI estate review Autocar. www.autocar.co.uk. en. 2018-07-06.
3. Web site: Mercedes-Benz OM646, OM647 and OM648 engines. australiancar.reviews. en. 2018-07-06.