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Mercedes-Benz OM646 engine

{{More citations needed|date=April 2019}}{{Infobox automobile engine

| name = Mercedes-Benz OM646

| image = OM646.JPG

| manufacturer = Mercedes-Benz

| aka =

| production = 2002–2010

| predecessor = Mercedes-Benz OM611 engine

| successor = Mercedes-Benz OM651 engine

| configuration = Inline-four engine

| displacement = 2.2 L (2148 cc)

| bore = {{convert|88|mm|2|abbr=on}}

| stroke = {{convert|88.3|mm|abbr=on}}

| block = Cast iron

| head = Aluminium alloy

| valvetrain = DOHC

| compression = 17.5:1 (DE22 LA EVO), 18.0:1

| supercharger =

| turbocharger = Single

| fuelsystem = Common rail

| management =

| fueltype = Diesel

| oilsystem =

| coolingsystem = Water cooled

| power = {{convert|65-125|kW|PS hp|0|abbr=on}}

| specpower =

| torque = {{convert|220-400|Nm|lbft|0|abbr=on}}

| length =

| width =

| emissions level =Euro 4

| emissions control =EGR, DPF

| weight =

}}

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,{{Cite news|url=https://www.themotorreport.com.au/car-article/mercedes-benz-reveals-new-range-of-four-cylinder-diesels-66720.html|title=Mercedes Benz reveals new range of four cylinder diesels|last=Klose|first=Steane|date=2008-04-11|work=The Motor Report|access-date=2018-07-06|language=en-US}} and Euro 4 emission standard compliance (from 2003).{{Cite web|url=https://www.autocar.co.uk/car-review/mercedes-benz/c-class/first-drives/mercedes-c200-cdi-estate|title=Mercedes C200 CDI estate review {{!}} Autocar|website=www.autocar.co.uk|language=en|access-date=2018-07-06}} 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.{{Cite web|url=http://australiancar.reviews/mercedesbenz_OM646_OM647_OM648.php|title=Mercedes-Benz OM646, OM647 and OM648 engines|website=australiancar.reviews|language=en|access-date=2018-07-06}}

Models

class="wikitable sortable" style="text-align: center;"

!Engine

!Power

!Torque

!Years

rowspan="4" |OM646
DE22 LA R

|{{convert|65|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|220|Nm|lbft|0|abbr=on}} @ 1,400–2,500 rpm

|2003–2010

{{convert|70|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|250|Nm|lbft|0|abbr=on}} @ 1,400–2,600 rpm

|2006–2010

{{convert|80|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|270|Nm|lbft|0|abbr=on}} @ 1,600–2,600 rpm

|2003–2010

{{convert|85|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|290|Nm|lbft|0|abbr=on}} @ 1,600–2,600 rpm

|2006–2010

OM646 DE22 LA R

|{{convert|90|kW|PS hp|0|abbr=on}} @ 4,200 rpm

|{{convert|270|Nm|lbft|0|abbr=on}} @ 1,400–2,800 rpm

|2003–2010

rowspan="4" |OM646
DE22 LA

|{{convert|65|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|220|Nm|lbft|0|abbr=on}} @ 1,600–2,600 rpm

| rowspan="3" |2006–2009

{{convert|80|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|280|Nm|lbft|0|abbr=on}} @ 1,600–2,400 rpm

{{convert|95|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|305|Nm|lbft|0|abbr=on}} @ 1,200–2,400 rpm

{{convert|105|kW|PS hp|0|abbr=on}} @ 4,200 rpm

|{{convert|340|Nm|lbft|0|abbr=on}} @ 2,000 rpm

|2003–2004

OM646 DE22 LA

|{{convert|110|kW|PS hp|0|abbr=on}} @ 3,800–4,200 rpm

|{{convert|330|Nm|lbft|0|abbr=on}} @ 1,200–2,400 rpm

|2003–2010

rowspan="2" |OM646
DE22 LA EVO R

| rowspan="2" |{{convert|100|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|270|Nm|lbft|0|abbr=on}} @ 1,600–3,000 rpm

|2007–2009

{{convert|340|Nm|lbft|0|abbr=on}} @ 2,000 rpm

| rowspan="2" |2006–2009

OM646
DE22 LA EVO

|{{convert|125|kW|PS hp|0|abbr=on}} @ 3,800 rpm

|{{convert|400|Nm|lbft|0|abbr=on}} @ 2,000 rpm

= OM646 DE22 LA R =

= OM646 DE22 LA =

= OM646 DE 22 LA EVO R =

= OM646 DE 22 LA EVO =

References

{{reflist|30em}}

OM646

Category:Chrysler engines

Category:Diesel engines by model

Category:Straight-four engines