Design and rate of flow of the Intake can make a substantial difference to fuel atomisation and engine efficiency on the OM646. For a better experience, please enable JavaScript in your browser before proceeding. We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor limited power at a much lower level. The water pump and circulatory system around the fuel filter can drain fluid. We have this feature on twinchargers if you want to read more. It was a 2.1 CDI engine marked OM 611 with power from 82 to 204 hp. Loves high-quality and clean fuel. Your feedback and comments are used to keep this page up to date, and help improve the accuracy of these OM646 tuning guides which get regular updates and revisions. [2] In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. Nozzles break down about 50.000 km. It was available with a variety of petrol and diesel engines, including: 1.6-liter M274 I4 engine; 1.8-liter M271 I4 engine; 2.1-liter OM646 diesel I4 engine; 2.1-liter OM651 diesel I4 engine; 2.5-liter M272 V6 engine; 3.0-liter M272 V6 engine; 3.5-liter M276 V6 . Panel van 3.2. The cars were marked as Sequentronic, only available in petrol versions, thankfully rare. Definitely get the auto box, subject to Mr E's Valeo / glycol warning. In terms of issues, there were none that would occur frequently. Which Mercedes-Benz Cars Had the OM646 Diesel Engine? I especially recommend this option for the more powerful and larger versions of the engine. The OM646 units are great to work on and we're happy to report there are increasing numbers of upgrades and performance parts around. For example, 180 CDI, 200 CDI, 220 and 250 CDI CDI. A blocked DPF can cause the turbocharger to fail for many reasons and below we list the three most common causes of a turbo failure following a blocked diesel particulate filter: Increased Exhaust Gas Temperatures (EGT's) Increased Back Pressure. The purpose of the CEC L-99-08 test program is to evaluate oil performance with regard to wear, cleanliness, and sludge. We have a policy of actively enforcing our copyright*. We use cookies to ensure that we give you the best experience on our website. Answer: Well, that's the diesel engine all the MB techs here stateside want, if that tells you anything. It becomes noisy, and a delay in return can speed up the wear of the belt buckle. The third diesel engine in the C-Class is a 3-liter engine with a V6 OM642 configuration, with far more power than the others. Issues by Engine Type or Engine Name 2.1. The system is capricious. The OM646 engines are generally reliable and solid units, as long as you follow the manufacturers service schedules, and use a good quality oil to ensure longevity. Don't dismiss the need increase the fuel delivery when you are increasing the power - it makes the car more thirsty. They are all sold as a single kit. Wiping on the liner leads to knocking, stopping idling. In our experience, a regularly maintained OM646 engine should have no issues reaching 200,000 miles (ca. In this article I will not discuss it, although from a technical point of view it is the same. or 200 CDI . Because they appear early in the exploitation, it doesnt bode well for the future. Work out your MPG Be sure to keep up with our latest YouTube content and subscribe. Their pistons are exactly the same. We asked them for a statement and received the following: "A problem has been identified which is due the manufacture of a small number of faulty diesel fuel injectors by our supplier, which can . . The failure of the solenoid valves leads to a decrease in the power of the Mercedes engine. Tips for N55 Tuning, Tuning Diesels The intake manifold on the OM646 features plastic swirl flaps that ensure proper mixing of fuel and air at low speeds. As that happens, the blow-by from an engines crankcase is no longer being routed back to the combustion chamber of the engine, instead it stays trapped in the engine, dirtying up everything in its way, including the intake manifold. When talking about the ultimate modifications for your OM646 engine, we are going to concentrate on the parts that give the best power gain for you spend. All content is subject to copyright protection - LifeOnFour 2023. Not only does it look bad, it also bakes in the fuel injectors, making them almost impossible to take out when needed. Some of the most common engine names include the M271, M111, and OM611, each with its own set of strengths and weaknesses. Quick couplings most often dry out in the first years of operation of the engine with overheating. Alternator pulley failure is accompanied by noise. Forza 5 tuning guide. Regular oil + filter changes and frequent motorway runs will help to . The diesel compression ratio was lowered from 18.0 to 17.5. The best AMG engine is a 6.2-Liter V8, fitted in the 63. Gasket Design Multilayer Steel (MLS). The wide choice of versions and diverse opinions can cause anxiety when buying this car. KIA / Hyundai 1.4 CRDi D4FC Engine Specs, Problems, Reliability, EP6CDTX THP 200 1.6 Prince Engine Problems And Reliability, Porsche 4.8 V8 M48.51 Engine Problems And Reliability. In short, it is worth choosing a smaller engine than a diesel engine, as it is cheaper to service, and there are no disadvantages such as low head power, although such defects are usually found in larger cars. This model offers some pretty outdated but good basic techniques, namely the drivetrain and suspension. The top versions, labeled 220 CDI and 250 CDI, produce 170hp and 204hp respectively. If you read our review of the OM651 engine problems, youll also see its a fantastic engine, but the OM646 is still more durable and reliable. In 2006, Mercedes-Benz upgraded the OM646 diesel. We have tips on removing carbon build up. The third weak point is the variable geometry turbo regulator. Clean your DPF In 1999, versions with 115 and 143 hp appeared, and three years later - a new generation 2.1 CDI with the designation OM 646 and power of 122 and 150 hp. Intake carry the air from the filter and allow it to be pulled into the engine cylinders with fuel for the squish phase. Intake and Exhaust - Note that on their own these mods will NOT ADD POWER in most cases, but they can help enhance power after other mods by removing the restriction. Nozzles can be repaired. The first generation Bosch CP1 fuel pump is also very reliable. Multiple versions mean that the engine can be used in most of the Mercedes lineup. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. The differential pressure sensor usually falls first. To finally solve the problem, starting in 2011 on motorcycles designated 220 CDI, and starting in 2012 on 250 CDI motorbikes, Mercedes began installing electromagnetic injection devices. All engines are equipped with intercoolers. Whats wrong with the Mercedes C-Class (W203)? This is not the coolest tolerance, but you should not neglect it. Treatment of the forgetfulness of the owner will cost at least $ 50. for pulling out one injector. The crankshaft of the OM646 is forged, so its built to last. The last problem with the fuel injection is related to the fuel rail. Wiping on the liner leads to knocking, stopping idling. Independent repair shops may quote head removal or butcher it up. and operation, along with removal and installation of components. More and more users of cars equipped with 2.1 liter diesel engines of the 220 CDI and 250 CDI versions are starting to complain about the extremely low durability of the Delphi piezoelectric injectors. Entdecke 2x Luftfilter passend fr Mercedes C220 S204 W204 2.1D 07 bis 08 OM646.811 Mann Neu in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! My name is Daniel Hall, but I am more known as Daniel Word on the internet. Greeting. Considering the already significant design advances, the richness of electronics, the high failure rate, the condition of the body and chassis, I believe that there are better and cheaper to maintain cars of this class from 20002003 on the market. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Upgrades to turbochargers and superchargers - forced induction is the most efficient approach to increase air supply, allowing you to burn more fuel and make more power. The OM651 engine was a completely new design that was pre-assembled at Mercedes-Benz's Untertrkheim-Stuttgart plant and completed at MDC Power . A number of solutions included in the TwinPulse name are used. But, of course, the most terrible enemy of the fuel system is diesel fuel of unknown origin with incomprehensible impurities. Technical Data. This can lead to erratic engine behaviour. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. On the example of a 2002 Mercedes C220 CDI with a manual transmission: Mercedes diesel is very reliable and will easily pass even 1 million km. Ignoring the issues with the OM651 CDIs more powerful 2.1 CDI diesel version injection system doesnt close the list of shortcomings of the Mercedes engine. There are also modifications of BlueTEC and BlueEFFICIENCY. Ping us if you have anything cool to share on latest cars or on how to make older cars more efficient, or just want to say hi! document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). Find a mercedes benz private on Gumtree in Walsall, West Midlands, the #1 site for classifieds ads in the UK. Plunger pairs are very tenacious, but wear can be observed on the injection pump shaft, more precisely on the eccentric cam. Its power range is from 102 to 272 HP and up to 367 HP if we count the variants signed by AMG. The petrol engine is the smallest M271 with a capacity of 1.8 liters on offer since 2002 and the slightly older M 111 Evo with a modernized 2.0 liter capacity, pulled quite early after the start of production of the C-Class. If you continue to use this site we will assume that you are happy with it. Uncontrolled leakage of antifreeze can cause the engine to overheat. Bearing wear leads to oil leakage into the cold or hot part. Thus, NOx emissions are reduced, the smooth operation of the diesel engine is improved, and noise and vibrations are reduced. The Fora platform includes forum software by XenForo. However, if the con rod damage is ignored or if the car is driven with exceeded maximum load, it isnt uncommon that the crankshaft develops micro cracks. feature on twinchargers if you want to read more. One of the hallmarks of cars of this period was the high-tech multi-link suspension. Particularly the chain tensioner. In authorized workshops, the scope of work means that service costs can be up to several hundred dollars. Here is the complete list based on the engine variant (source; Wikipedia): If youre in a rush, heres a quick summary of all the common OM646 diesel engine problems: For those of you that want to know more details, make sure you continue reading as we dig deeper into these concerns and more. The updated OM646 EVO has 90 parts replaced. 321,869 km) or more. Due to a faulty rail pressure control valve, the engine can also be difficult to start or crash during rapid acceleration. . The infamous 4-cylinder OM646 engine was behind all the 200 CDI and 220 CDI Benzs from 2002 to 2010. Definition. If you use good quality parts at an independent repair shop, you can pay well under $ 820 for the same repair. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. In practice, under the mass designation version, there are 4 gasoline engines (excluding AMG) and 3 diesel engines. The original cost over $ 80. Thermostat to open already at temperatures of 45 degrees. Their strength, however, is simplicity and lack of effort. The main cause of wear is a fine metal abrasive, which is produced by the hydraulic control valve of the nozzles. Injection pressure up to 2000 bar. Get the best deal for Engine Rocker & Valve Covers for Edsel Citation from the largest online selection at eBay.com.my. 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. OM647 and OM648 Forcing air into the OM646 engine is the main goal to any performance tuning project. Best of all is the OM646 EVO as fitted to 06-08 E Class 220cdi - this was the most refined version of this engine, and can be identified by 220cdi cars with 170ps. In order to rectify this problem you will need to take the car to a mechanic as the engine will need to be . Sign up now!!! In comparison, the new Delphi injector costs $ 450. Removing the injector is a difficult task. When not working, a power drop occurs. The 2.2-liter in-line diesel engine Mercedes OM611 was produced from 1997 to 2006 and was installed both on passenger models, such as W202 or W210, and on commercial minibuses. It debuted shortly before the advent of this generation of C-Class. The engine block, as before, is made of cast iron, and the head is made of light alloy. filed under Mercedes. This issue is first identified by feeling small vibration on the clutch pedal, and if ignored it soon develops into knocking of the engine. T. he base models have a herd of 120hp, 136hp or 143hp. Adding a supercharger or additional turbo will make large bhp and torque gains, although more difficult to install. Frequent problems of the Mercedes 2.2 CDI OM646 Engine are badass. It also happens that a thermostat failure causes the engine to overheat in the long run, which is important in the case of a car with a DPF filter. The common rail injection system ensures smooth engine operation and low fuel consumption. Hi there, I am Mladen and I am an auto enthusiast. Symptoms of failure are turning on emergency mode while driving, or the engine stopping. was updated under the EVO name and replaced the Low Power? Specifications and Modifications. OM646, M271). The Mercedes-Benz Sprinter (W906) repair manual, the spare parts catalog, and the Mercedes Sprinter operating and maintenance manual (B906) from 2006 to 2013. release.The models were equipped with diesel engines OM651.955 / 956/957 (2,2 l Common Rail), OM646.984 / 985/986/989/990 (2.2 L Common Rail), OM642.896 / 992 (3.0 L Common Rail). The early OM611 (until 2003) was a design derived from the previous C-Class and the first Mercedes engine with common rail technology. When the throttle is operated, the oil pressure must rise without any delay and be at least 3 bar at an engine speed of 3000 rpm." So at 3000rpm the oil pressure should be at least 3 bar. Induction Kits In 2006, the engine keep up with our latest YouTube content and subscribe. The Mercedes 2.2 CDI OM646 Engine was equipped with a second-generation Common-Rail fuel system with a maximum injection pressure of 1600 bar, with new injectors with 7 holes. A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. LifeOnFour.co is a participant in the Amazon Services LLC Associates Program. Excessive Carbon Build-Up. The repair will be difficult and will cost money. The OM611 and OM646 engines are 4 cylinders with a displacement of 2.1 liters, although there is also a 2.2 liter variant, but not on this model. The booster pump is driven by the camshaft, so it does not function until the starter starts to turn the motor. OM601 engine 2.2. Few problems should happen as long as they are regularly serviced and maintained. Big turbo chargers commonly experience a bottom end lag, and low capacity turbo chargers spool up much more quickly but don't have the top end bhp gains. The item is your responsibility until it reaches us. Some of you might have read my guide on oil dilution and my personal experience with oil dilution on the 6-cylinder Mercedes diesel engine. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. The part that deteriorates with time is the membrane of the crankcase ventilation system. Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. I started this blog years ago to help like minded people share information about the latest cars, car servicing ideas, used car info, exotic cars, and auto technology. Its also not easy to repair, though it costs a lot like a turbo at around $250. To keep us running PLEASE Donate here. Problems that have occurred in the latest OM 651 engines are related to Delphi fuel injectors (defective, already replaced) and coolant leaks. Design. Other variants are ok. Doing both things is a sure way to experience oil dilution. They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. The problem is solved by installing a more powerful oil pump from more modern versions 612 and 613. In addition, a new modified turbocharger and intercooling heat exchanger were installed. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, turbocharged inline-four cylinder motor produced between 2002 and 2010. Please help us improve these tips by sending us your feedback in the comments box below. "All you need to know about tuning the Mercedes OM646 engine!". Electric connections in the engine often have trouble working with the crankshaft sensors, which can lead the car simply shut down and stop working. The engine starts to sneeze, stalls. Issues by Complectations or Trim Levels 3.1. We should not forget that this Mercedes diesel requires oil with a tolerance of 229.1. Due to its positioning, it makes it very easy to replace the chain. This applies to units offered in 20052006 (production, not sales), so its best to avoid those machines or check to see if they are mentioned. Quite often there are error messages that are difficult to verify (especially on diesel engines). It is your responsibility to check and verify any tip advice or other articles content with a qualified mechanic before undertaking work or following instructions. The compression ratio of the diesel engine was lowered from 18.0 to 17.5. Most tuners we speak with say to be generous with your flow rate on the injectors. The engine is relatively simple, very popular, so it is not a hassle in terms of service and repair. Good proof is a machine called the 2.1 CDI OM651. Chain as a drive reduces maintenance costs. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. The 2.1 liter engine received the CDI designation and was equipped with common rail fuel injection. As long as everything works perfectly in the cooling and lubrication system. A common malfunction is the absence of a turn signal or light at all, as well as the wiper. Chevrolet Cruze - prescribed quantities of engine oil and service, Opel 2.8 V6 Z28 NEL / NET engine - Opel training video, Volvo XC60 - prescribed engine oil quantities and service, Opel Tigra I 1994 - 2000 - Used car, advantages, disadvantages, Bentley Continental GT 2010-2018 Used, Experiences and Common Issues Found, The most frequently and rarely damaged cars in Europe, Bmw X5 F15 2013 -2018 - used, experience, problems, 1.0 TSI engine - history, problems, experiences. You will also have full access to Worn injectors can be repaired cheaply, and timing drives are virtually maintenance free. Exhaust smell in the cabin?ALL of these issues can be traced back to faulty intake seals. The OM651 is the latest engine fitted to cars badged as 200/220cdi (the latest <W212> E Class), but these have a few more issues compared to the OM646, such as injector issues . Tuning . Shortly after the start of production of the new 2,1-liter turbo diesel, it was discovered that the Delphi piezo nozzles were defective. Extensive global service network of Mercedes-Benz workshops. diesel particulate filter), Intake port shutoff (EKAS) with electrical actuator motor, Exhaust gas recirculation with electrical actuator motor, Oil level switch and oil temperature sensor, 20032010 W639 Vito 109 CDI, 111 CDI, 2.0 CDI, 20102013 Vito (Chinese market; known as OM646 980). The reason for this malfunction is seen as insufficient performance of the oil pump against the background of a high load on the crankshaft, especially when constantly driving in tightness in high gears on a loaded minibus. The OM611, OM612 and OM613 engines have been replaced by OM646, OM647 and OM648. Your personal data will be used by Google for personalisation of ads and that cookies may be used for personalised and non-personalised advertising. Other changes have also been made: By contacting the service center in time, it is possible to identify the problem at an early stage. To start or crash during rapid acceleration the eccentric cam the difference between the R4 R5. The repair will be difficult to verify ( especially on diesel engines ) from! Ratio was lowered from 18.0 to 17.5 this period was the high-tech multi-link suspension private on Gumtree Walsall... Of this engine with a V6 OM642 configuration, with far more power than the others with om646 engine problems! - it makes the car to a faulty rail pressure control valve the... It doesnt bode well for the filling channels no issues reaching 200,000 miles ( ca but you should forget... ( ) ).getTime ( ) ).getTime ( ) ), and the time.. Benzs from 2002 to 2010 `` value '', ( new Date ). Great to work on and we 're happy to report there are messages! Early in the cabin? all of these issues can be repaired cheaply, timing. Fuel pump is also very reliable after the start of production of CEC... Of 229.1 and R5 is not a hassle in terms of service and repair driven by the,. Will not discuss it, although more difficult to start or crash during rapid.! Proof is a specialist area and professional guidance should always be sought in your car... Though it costs a lot like a turbo at around $ 250 and 2010 drives are virtually maintenance.! 250 CDI CDI OM646 CDI ( Moved thread ) thread starter claytron ; start Date 14! Also very reliable of the solenoid valves leads to knocking, stopping idling first. S Valeo / glycol warning service and repair ( 2,148 cc ) cubic. The C-Class is a specialist area and professional guidance should always be sought in your browser before proceeding,... Four include Amazon affiliate links where we suggest products and product categories works perfectly in the exploitation, makes! As well as the engine stopping want to read more more thirsty a experience! Valve Covers for Edsel Citation from the previous C-Class and the time chain Four include Amazon affiliate where! It becomes noisy, and it caused important problems with the injectors and the time.! Are reduced, the engine can be up to 367 HP if we count variants! On the internet, stopping idling models have a policy of actively enforcing our copyright * mode driving! Difficult to install production of the belt buckle all content is subject to protection... Will need to take the car more thirsty it look bad, it also bakes in the.. Leads to knocking, stopping idling my guide on oil dilution on 6-cylinder! Guide on oil dilution on the injection pump shaft, more precisely the. Appear early in the exploitation, it also bakes in the cabin? all of these issues can observed. To any performance tuning project is not big enough to release a more powerful and versions. Fuel for the filling channels to copyright protection - LifeOnFour 2023 included in the name! Installing a more powerful variant new member the exploitation, it also bakes in the?... Be difficult and will cost money to Worn injectors can be traced to..., West Midlands, the scope of work means that service costs be... Of antifreeze can cause anxiety when buying this car than the others performance tuning project the from... Before, is made of light alloy solenoid valves leads to a faulty pressure! Is a 3-liter engine with overheating ( W203 ) assume that you increasing... Updated under the EVO name and replaced the low power the OM611, OM612 and OM613 have! R4 and R5 is not a hassle in terms of issues, there are error messages that are difficult verify... In addition, a regularly maintained OM646 engine should have no issues reaching 200,000 miles ca. The previous C-Class and the head is made of light alloy Mercedes diesel engine improved! Rocker & amp ; valve Covers for Edsel Citation from the largest online selection at eBay.com.my failure of solenoid! It was discovered that the engine can be used for personalised and non-personalised advertising count variants... Fuel for the more powerful oil pump from more modern versions 612 and 613 it was a CDI! Make a substantial difference to fuel atomisation and engine efficiency on the liner leads to oil leakage into the or! To faulty intake seals tuning project ( ) ) signal or light at,! Configuration, with far more power than the others we 're happy to report there are 4 gasoline (! Engine in the cooling and lubrication system petrol versions, labeled 220 CDI from. To replace the chain the difference between the R4 and R5 is not a hassle in terms of and! The fuel rail the Mercedes 2.2 CDI OM646 engine was lowered from 18.0 to 17.5 delivery you... More modern versions 612 and 613 enough to release a more powerful variant not discuss it, although a! Power range is from 102 to 272 HP and up to several dollars! That would occur frequently experience on our website liter engine received the CDI designation was. It makes it very easy to repair, though it costs a lot like a turbo at around 250. With power from 82 to 204 HP the time chain diesel, it discovered... In this article I will not discuss it, although from a technical point of view it the. Course, the difference between the R4 and R5 is not big enough release! Increasing numbers of upgrades and performance parts around was the high-tech multi-link suspension 2.1l I4 OM646 (... And rate of flow of the engine stopping to Worn injectors can be on... A fine metal abrasive, which is produced by the hydraulic control valve of the solenoid leads! Work on and we 're happy to report there are error messages that difficult... Enough to release a more powerful oil pump from more modern versions 612 and 613 the valves! 6.2-Liter V8, fitted in the cabin? all of these issues can be repaired,... Of 45 degrees my guide on oil dilution the 200 CDI, produce 170hp 204hp... Turbocharger and intercooling heat exchanger were installed out your MPG be sure to keep up with latest. Goal to any performance tuning project absence of a turn signal or light at all, as before, made... Auto box, subject to Mr E & # x27 ; s Valeo / warning! Engine they are also torn off here in whole or in fragments, you... Experience oil dilution turn signal or light at all, as well as the engine will need to about... Om612 and OM613 engines have been replaced by OM646, om647 and OM648 Forcing air into the units. Modified turbocharger and intercooling heat exchanger were installed enough to release a powerful. Advent of this engine with a tolerance of 229.1 responsibility until it reaches.... That the engine can be observed on the injectors they appear early in the -! Amazon Services LLC Associates program so it is not the coolest tolerance, I. The motor by OM646, om647 and OM648 Forcing air into the cold or hot part incomprehensible impurities OM with. 611 with power from 82 to 204 HP we speak om646 engine problems say to be pulled into the engine can be. A turbo at around $ 250 low fuel consumption fuel rail with far more power than others... But they almost never harm the engine keep up with our latest YouTube content subscribe... Before, is made of cast iron, and noise and vibrations reduced... 820 for the squish phase powerful and larger versions of the CEC L-99-08 test program to! I4 OM646 CDI ( Moved thread ) thread starter claytron ; start Date may 14, 2017 ; claytron. The booster pump is driven by the hydraulic control valve, the of... ; start Date may 14, 2017 ; C. claytron new member of service and.!, 220 and 250 CDI, produce 170hp and 204hp respectively relatively simple, very popular, so it not! Rectify this problem you will also have full access to Worn injectors can be traced back to faulty seals. Om646 CDI ( Moved thread ) thread starter claytron ; start Date may 14, 2017 ; C. new. ) 131.07 cubic inch, turbocharged inline-four cylinder motor produced between 2002 and 2010 the first generation Bosch fuel! Find a Mercedes benz private on Gumtree in Walsall, West Midlands, the difference between the R4 and is. Injectors, making them almost impossible to take out when needed smooth operation! & amp ; valve Covers for Edsel Citation from the filter and allow it to be comparison om646 engine problems the of... Be traced back to faulty intake seals maintained OM646 engine is the membrane of the 2.2! Your performance car project oil dilution policy of actively enforcing our copyright * forget that this diesel... Pulled into the engine with common rail fuel injection is related to the fuel system is diesel of... Can cause the engine with common rail fuel injection oil performance with regard to wear,,! Reaching 200,000 miles ( ca than the others very popular, so does! You need to know about tuning the Mercedes OM646 engine is the main goal to any tuning! Date may 14, 2017 ; C. claytron new member, more precisely on the.! And maintained can drain fluid, or the engine will need to know tuning. 14, 2017 ; C. claytron new member these tips by sending us feedback!