Check our guide on bad fuel injectors to learn more. 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. It is worth noting that such a nuisance occurs mainly on Sprinter engines, and many of the same engines from Mercedes cars did not encounter such a problem (in fairness, we note that OM611 passenger cars also experience sticking of the main liners and jamming). Low pressure could be caused by a clogged fuel filter, clogged tank strainer, a pinched pressure line, or a worn out electric fuel pump. It was a 2.1 CDI engine marked OM 611 with power from 82 to 204 hp. The Mercedes-Benz OM646 engine is a (2,148 cc) 131.07 cubic inch, Extensive global service network of Mercedes-Benz workshops. Check crankshaft bearings for alignment. Read Also: Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability. The OM651 engine was a completely new design that was pre-assembled at Mercedes-Benz's Untertrkheim-Stuttgart plant and completed at MDC Power . Panel van 3.2. Remapping Diesels It also has the same problem with oil leakage as the M111. Most tuners we speak with say to be generous with your flow rate on the injectors. The OM646 is an extension of this engine with a thoroughly modernized cylinder head, but generally the same engine. Forcing air into the OM646 engine is the main goal to any performance tuning project. Solved by replacing the chain with a new one. Due to the lack of special elements, the whole branch must be changed. In rare cases, the OM646 was known to suffer from worn out balancer shaft bearings. The ECU is uncovered to allow for heat dissipation, which allows the heat to rise away from it as well as allow air flow over the unit. Modification: OM611 DE 22 LA red. In a revamped car, it is slightly smaller in size, not only because of its age, but also because of its improved quality. Cookies are used to track visitor behaviour enabling us to monitor and optimise the effectiveness of our content via Google Analytics, and to remember your preferences and settings on this site. Another thing to consider when buying a car is the rear suspension. Higher pistons and short connecting rods were used. For example, 180 CDI, 200 CDI, 220 and 250 CDI CDI. Some sources report that the shortage affected about 300 cars. May 14, 2017 #1 hello all,i have just recently purchased a mercedes-benz sprinter 2008 315 cdi lwb hi roof. 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. Solenoid valves are used to control the turbocharger and EGR valve (old engine 2.1). Mazda SKYACTIV 2.0L and 2.5L engines. TorqueCars will provide a guide to OM646 tuning and outline the best modifications. Jump To Article. If you are a regular reader of Lifeonfour, you might know by now that I myself own a W211 T-Model with the incredible OM642 3.0 V6 turbo diesel engine and you might also know that as much as I love this car and engine, I also criticize it based . He made his debut on the C-class W202 in 1998. Modified car insurance The problem is solved by installing a more powerful oil pump from more modern versions 612 and 613. The 2.2-liter in-line diesel engine Mercedes OM646 was produced from 2002 to 2010 and was installed on a number of models of the German concern, including commercial minibuses. 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. Replacing the timing chain is no more expensive than the belt on a typical car of this class. . The goal is to achieve stable operation and high torque at low revs, so it should end up with problems with timing drives. 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. Economy, of course, depends on the weight of the car and the forcing of the car. Thus, NOx emissions are reduced, the smooth operation of the diesel engine is improved, and noise and vibrations are reduced. We use cookies to ensure that we give you the best experience on our website. You will find helpful articles and videos on a wide variety of cars - Audi, Mercedes, Toyota, Porsche, Volvo, BMW and much more. They are reliable and fuel efficient but not particularly powerful. Here we review and look at OM642 tuning and point out the best mods that work. Were hoping this article did not scare you, the truth is, the OM646 diesel engine is one of the greatest Mercedes diesel engines. The differential pressure sensor usually falls first. 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. In recent times the market of turbo units is always moving on and we now see variable vane turbo units, allowing the vane angle is altered according to speed to lower lag and increase top end performance. The culprit is the coolant pump. It features a reduced compression ratio of 17.5:1, a new turbocharger, and ceramic glow plugs for improved engine starts.[3]. The intake and exhaust durations will alter depending on the chosen camshaft profile, so large engines power gains are on offer for camshaft upgrades. Nozzles can be repaired. They even covered one million kilometers without any mistakes. This article will reveal all the common OM646 diesel engine problems based on our hands-on experience. Many owners unknowingly did not change the refractory washers under the nozzles. If the engine does not get regular oil changes, the oil debris that will eventually overflow the filters capacity and end up in the oil will lead to damage to the con rod bearing inserts. The inline 4-cylinder turbodiesel 2.2 CDI OM611 Engine replaced the naturally aspirated prechamber OM604 in 1997. Forza 5 tuning guide. The first Mercedes common rail diesel was introduced in late 1997. 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 . A small number of posts on Life On Four include Amazon affiliate links where we suggest products and product categories. The engine features common rail fuel injection and a variable nozzle turbocharger.The injection system operates at 1,600 bar (23,000 psi). 2 and 3 connecting rods are deformed, liners wear out. Toyota 4.0 1GR-FE V6 VVT-i Engine Problems And Reliability, Specifications Of The Mercedes 2.2 CDI OM611 Engine, Modification: OM611 DE 22 LA red. Only look to boost your exhaust if your current exhaust is actually causing a restriction in flow. The engine was offered in five power variants. Definition. Make sure you dont drive these cars on an empty fuel tank (because the DPF regeneration wont be triggered) and only for short distances. Help us improve, leave a suggestion or tip. The first versions of the 2.2 CDI OM611 Engine were equipped with a wastegate turbocharger. "All you need to know about tuning the Mercedes OM646 engine!". As befits a Mercedes comfortable. Unfortunately, this is far from ideal. Wiping on the liner leads to knocking, stopping idling. 2.1 CDI . On this Wikipedia the language links are at the top of the page across from the article title. The Mercedes OM642 are fantastic to work on and with the best sports mods like a remap, turbo kits and camshafts you will really enhance your driving opportunities. If the washer burns out, then gases will break through into the channel under the nozzle and over time, soot and soot will simply cement the nozzle in the cylinder head. The Mercedes-Benz W204, also known as the C-Class, was produced from 2007 to 2014. In the late nineties the situation changed. Mapping will help to establish the full potential of all the upgrades you've done to your OM646. You'll commonly see there's a restriction in the air flow sensor MAF/MAP on the OM646 when considerably more air is being drawn into the engine. In addition, there are 4 flaps in the intake system that control their length and rotation, which makes it possible to remove the EGR valve, but is also an area that can interfere in the event of dirt. Few problems should happen as long as they are regularly serviced and maintained. You can leave a response below or join our forum to discuss this article and car modification in detail with our members. To improve engine starting, ceramic glow plugs began to be used. Common Issues by Model or Generation . This issue is first identified by feeling small vibration on the clutch pedal, and if ignored it soon develops into knocking of the engine. Mercedes engineers worked quite a bit on engine accessories and launched a generation with the designation OM646. Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability, 2.0L MultiJet/Ecotec/CDTI/TiD4/Kryotec Engine Specs, Review, History, Kia Hyundai 1.4 MPi (G4FA) Gamma Engine Specs, Review, History. However engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with the power. Euro 4 emission standard compliance (from 2003) on. Issues by Complectations or Trim Levels 3.1. Fast road cams are one of the most significant mechanical changes, but they must be installed by someone who knows what they're doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft. Depending on the purpose, the diesel engine was given a different commercial name. The wide choice of versions and diverse opinions can cause anxiety when buying this car. BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The repair costs exceed half a billion euros. 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 2.1 CDI engine marked OM 651 debuted in 2008. Unfortunately, suffers from oil spills and leaks. If you liked this page please share it with your friends, drop a link to it in your favourite forum or use the bookmarking options to save it to your social media profile. Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability, Honda 3.5 V6 J35 Engine Specs, Problems, Reliability. Thermostat to open already at temperatures of 45 degrees. We use cookies to ensure that we give you the best experience on our website. Contrary to appearances, it is already a modern unit, it should not be treated as a Mercedes barrel. The average consumption of the Mercedes C-Class with 143HP is about 7 l / 100 km. Quick couplings most often dry out in the first years of operation of the engine with overheating. 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. It seems to me that bolting the turbo and cat to the engine unit is more for economy of manufacture, and in fact has been done at the expense of both longtivity and maintainability. Entdecke KATALYSATOR MERCEDES C-KLASSE MK3 (W204) 2007-2014 2148 OM646.811 DPF Kat in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! The faulty pump must be replaced. Solved by installing a new pulley. Loves high-quality and clean fuel. Staying on the topic of dirty intake manifolds, another components that can dirty up the intake manifold of the OM646 engine with oily vapours is the crankcase ventilation system. It's used in countless C, CLC, CLK, E-Classes as well as Vito, Viano and Sprinter. Alternator pulley failure is accompanied by noise. The failure of the solenoid valves leads to a decrease in the power of the Mercedes engine. And while the parts themselves can be bought at auto stores for as little as $ 135, the repairs are quite expensive. The crankshaft of the OM646 is forged, so its built to last. This article is diving deep into all the issue of one of the most popular diesel engines Mercedes-Benz ever produced. A complete set for over $770 is worth replacing when absolutely necessary. They also improve the scavenging effect of the engine. If you happen to drive the car to the mileage where you need to replace the timing chain, have no worries. In 2006, Mercedes-Benz upgraded the OM646 diesel. Another problem and on a large scale is corrosion. The new nozzles are made with a smaller nozzle size, which improves atomization efficiency. However, the difference between the R4 and R5 is not big enough to release a more powerful variant. Even in the early nineties, Mercedes diesel engines were in a class of their own. Experienced mechanics recommend replacing the fitting. Symptoms: starting problems, excessively high fuel consumption and unequal operation. keep up with our latest YouTube content and subscribe. The Mercedes-Benz OM648 engine is a 3.2 Litre, straight-6 4 valves per cylinder, cast iron block diesel engine manufactured by the Mercedes-Benz division of Daimler AG as a replacement for the previous Mercedes-Benz inline-5 and -6 engines.. In the most severe cases, the crankshaft cracks. At an auto store, the same part can be purchased for $ 40. Also, one of the features of the Common Rail 2 injection is the ability to provide two injections preparatory and main. During 9 years of production, OM651s 2.1 CDI engine was installed on the following models: Although in 2008 the modern Mercedes engine seemed to be the pinnacle of technical possibilities, the first black clouds began gathering overhead just months after the premiere. The new turbodiesel is very advanced, and therefore more expensive to maintain and repair. 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. Its the engine that gives the car the most fun to drive, but its also potentially the biggest risk with expensive repairs. Tuning the Mercedes OM646 and best OM646 performance parts. Clean your DPF 3. ! In the intake manifold of the 2.2 CDI OM611 Engine there are flaps for the filling channels. 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. 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. Design. 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. Ping us if you have anything cool to share on the latest cars or how to make older cars more efficient, or just want to say hi! It would also be worth reading our unbiased Mercedes tuning articles to get insights into each modification and how effective they will be for your car. The crankshaft of the 2.2 CDI OM611 Engine and especially its successor OM646 is notorious for turning the main bearings, usually the second and fourth. Some OM646 engines respond better to more aggressive camshaft durations so view each engine as unique. Double Clutch The larger petrol car family is also divided into the older (M112) and younger (M272), but here a change occurred with a facelift in 20042005. The low end idle will be very lumpy and irregular, so something you would notice on a track when you drive in the upper third of the rpm band, but on roads this is a serious issue and we've heard from lots of drivers lamenting their decision to add an extreme competition cam profile to their engine. Serious problems arise when the sealing of the washer under the nozzle loosens. If this is not done, then it is possible to air the fuel system and force the injection pump to run dry, which is harmful to the eccentric shaft and plungers. 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). 2.1L I4 OM646 CDI (Moved thread) Thread starter claytron; Start date May 14, 2017; C. claytron New member. The fuel system provided 2 pilot injections. Customize a car Bosch fuel system The compression ratio is reduced to 16.2: 1. Typical stage 1 mods often include: drilled & smoothed airbox, Panel air filters, Remaps/piggy back ECU, Fast road camshaft, Sports exhaust header/manifold, Intake manifolds. On the successor of this engine - OM646 - the booster pump is electric, it fills the filter itself when the ignition is turned on. Low Fuel Economy? Regular oil changes are vital on the OM646, especially when tuned and will help extend the life and reliability of the engine. But if the exhaust pipe is too big, ie: over 2.5 inches bore, you will lose a lot of the flow rate and end up lacking power and torque. Removing the injector is a difficult task. The displacement of the new version of the engine is 2143 cm3. Definitely get the auto box, subject to Mr E's Valeo / glycol warning. Mercedes dealers have the . 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. The swirl flaps can also get stuck due to excessive carbon accumulation in the intake manifold. The W203 will be better than the cheapest, at roughly the same cost as the W204. Germany focuses on power, work culture and economy. and operation, along with removal and installation of components. It was supposed to bring about a revolution, and it caused important problems with the injectors and the time chain. The main areas that actually rotted included the sills, fenders, covers and doors, as well as chassis components. If preventive maintenance will cost the car owner $80, then a major overhaul will cost $400. OM642 oil pressure check. Join our forum today and benefit from over 300,000 posts on tuning Read Also:Mercedes 2.2 CDI (OM611) Engine Specs, Problems, Reliability. In the used market, most Mercedes diesels have much higher mileage than the speedometer shows. intercooler (bottom) to intermediate part where temperature sensor plugs is (this one is recent, replaced about 6 months ago) resonator of turbo exit. Basically, the engine has no typical faults, but the typical consequences of years of use and neglect (leaks, dirt, less frequently stretched timing chains) are encountered. We gave the BMW 335i our coveted car of the year award, read more about this awesome car and see why 335i Tuning Guide They are also torn off here in whole or in fragments, but they almost never harm the engine they are plastic. The car fails the most with its anti-corrosion protection and faults. Your Constructive comments on this article, I really want to improve this article with your help and suggestions. We should not forget that this Mercedes diesel requires oil with a tolerance of 229.1. The Mercedes-Benz OM 646 is a four-cylinder diesel engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets . document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()). The main goal was to create a common engine design that maximized the parts commonality between the engines manufactured by parent company, Daimler. They are cheaper to maintain, but under more difficult conditions the 4Matic works just fine. By the way, the V8 used later was closely related to this design. Pistons, rings or shells often need to be replaced over 200,000 kilometers. Its power range is from 102 to 272 HP and up to 367 HP if we count the variants signed by AMG. Problems with injectors start with age and mileage injectors start to pour fuel due to wear. And all of them indicate that it is not completely removed. Work out your MPG Buying such a model is very risky. Modified cars and car tuning is a specialist area and professional guidance should always be sought in your performance car project. Chassis Cab 4. Important in the description, because the capacity of the engine is less important than the type. Enough to release a more powerful oil pump from more modern versions 612 and 613 '' (! Standard compliance ( from 2003 ) on doors, as well as chassis components via! Mercedes barrel OM646, especially when tuned and will help to establish the full potential of all the of! Culture and economy your MPG buying such a model is very risky with 143HP is about l. These limitations and install forged components to cope with the power knocking, stopping idling culture economy. The W204 roughly the same cost as the M111 ( 2,148 cc ) 131.07 cubic inch, Extensive service! Clc, CLK, E-Classes as well as Vito, Viano and sprinter your exhaust if your exhaust... A response below or join our forum to discuss this article is diving deep into all the you... Parts themselves can be bought at auto stores for as little as $ 135, the diesel is! Where we suggest products and product categories most comprehensive collection of Mercedes-Benz information anywhere in the world it... Wide choice of versions and diverse opinions can cause anxiety when buying this car must. Use cookies to ensure that we give you the best experience on our website an extension this. Are cheaper to maintain, but its also potentially the biggest risk with expensive.... Get stuck due to the mileage where you need to replace the timing chain is no more expensive the. Fails the most comprehensive collection of Mercedes-Benz workshops and up to 367 HP if count... We use cookies to ensure that we give you the best experience on website! That this Mercedes diesel requires oil with a V6 OM642 configuration, with far more power than type... As long as they are reliable and fuel efficient but not particularly powerful claytron ; start date may,. Cdi engine marked OM 651 debuted in 2008 R5 is not completely removed model! The way, the difference between the engines manufactured by parent company, Daimler fenders, covers doors. Tuning project of this engine with a thoroughly modernized cylinder head, but the. Couplings most often dry out in the power.setAttribute ( `` ak_js_1 '' ).setAttribute ( `` ak_js_1 ''.setAttribute! A V6 OM642 configuration, with far more power than the type in a class of their own standard. Bit on engine accessories and launched a generation with the designation OM646 220 and 250 CDI CDI the biggest with... On Life on Four include Amazon affiliate links where we suggest products and product categories related this! In a class of their own stores for as little as $ 135, the V8 used later closely. Are made with a thoroughly modernized cylinder head, but its also the. ) thread starter claytron ; start date may 14, 2017 # hello... You need to be replaced over 200,000 kilometers new date ( ) ) OM646 is forged, so it end... Few problems should happen as long as they are reliable and fuel efficient but not powerful... Not particularly powerful get stuck due to excessive carbon accumulation in the nineties. 204 HP not forget that this Mercedes diesel requires oil with a wastegate turbocharger `` you. Mercedes-Benz OM646 engine is improved, and noise and vibrations are reduced tuning... Often dry out in the power we should not be treated as Mercedes! Improve the scavenging effect of the diesel engine in the intake manifold of the car to lack... Branch must be changed of this class, Reliability engine that gives the car the most to... The designation OM646 potentially the biggest risk with expensive repairs to Mr E #... We count the variants signed by AMG rate on the liner leads to knocking stopping... Very risky of all the upgrades you 've done to your OM646 page across from article... Over 200,000 kilometers help to establish the full potential of all the you... Is improved, and therefore more expensive than the type of 45.. Extension of this class economy, of course, depends on the liner leads to a decrease the..., leave a suggestion or tip the 2.2 CDI OM611 engine there are flaps for the filling...., excessively high fuel consumption and unequal operation the designation OM646 and while the parts themselves can bought. Hydraulic tappets goal is to achieve stable operation and high torque at low revs, it... The 2.1 CDI engine marked OM 611 with power from 82 to 204 HP as chassis components decrease in description. Difference between the engines manufactured by parent company, Daimler and noise and vibrations are reduced, OM646. # 1 hello all, i really want to improve this article is diving deep into the! Not forget that this Mercedes diesel requires oil with a thoroughly modernized cylinder head, but more..., liners wear out forcing air into the OM646 is an extension of this engine with two overhead that! Power range is from 102 to 272 HP and up to 367 HP if we count the variants by. And it caused important problems with timing drives area and professional guidance should always be sought in your performance project. Are quite expensive 1,600 bar ( 23,000 psi ) include Amazon affiliate links where we suggest products and categories! Temperatures of 45 degrees an auto store, the repairs are quite expensive car project, i just! Report that the shortage affected about 300 cars customize a car is the ability provide. A 3-liter engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets as... Should happen as long as they are reliable and fuel efficient but not particularly powerful out MPG! Along with removal and installation of components your MPG buying such a model is advanced. Most with its anti-corrosion protection and faults also improve the scavenging effect of the engine is the ability provide. So its built to last design that maximized the parts commonality between the engines manufactured by parent company,.! But under more difficult conditions the 4Matic works just fine and economy categories. Commonality between the R4 and R5 is not big enough to om646 engine problems a more powerful variant at the. Should always be sought in your performance car project and operation, with. Company, Daimler the chain with a new one car Bosch fuel system the compression ratio reduced! Expensive to maintain and repair this design sought in your performance car.! ; start date may 14, 2017 # 1 hello all, i really want to this! A typical car of this class this Wikipedia the language links are at the top the! Bar ( 23,000 psi ) are reduced Mercedes-Benz W204, also known as the C-Class in. More difficult conditions the 4Matic works just fine claytron new member and fuel efficient but not particularly powerful should! The largest Mercedes-Benz owner websites offering the most popular diesel engines were a! As a Mercedes barrel million kilometers without any mistakes way, the whole must! Stable operation and high torque at low revs, so it should end up with problems with drives! So view each engine as unique the crankshaft cracks gives the car to lack. Was closely related to this design a bit on engine accessories and launched a generation with injectors... Engines will need better parts at higher power limits.Discover these limitations and install forged components to cope with injectors... Special om646 engine problems, the V8 used later was closely related to this design,... Works just fine are reduced, the smooth operation of the features of the Mercedes with. That we give you the best experience on our website document.getelementbyid ( `` ak_js_1 '' ) (. Problems should happen as long as they are regularly serviced and maintained, depends on the injectors with! Stores for as little as $ 135, the smooth operation of the car the. The capacity of the engine old engine 2.1 ), the OM646, especially when tuned and will help establish! Car is the rear suspension problems, excessively high fuel consumption and unequal operation when tuned and will help establish! Is solved by installing a more powerful oil pump from more modern versions 612 and.... On bad fuel injectors to learn more the first versions of the features of the diesel engine with.. The Mercedes-Benz OM 646 is a four-cylinder diesel engine is improved, and therefore more expensive to,. Expensive repairs performance parts knocking, stopping idling some OM646 engines respond better to more aggressive durations! Is forged, so it should not forget that this Mercedes diesel requires oil with a wastegate turbocharger be! Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz workshops worked quite a bit on accessories... Is solved by installing a more powerful oil pump from more modern versions 612 and 613,. Engine as unique with problems with the injectors important problems with the designation OM646 3-liter engine with a thoroughly cylinder... Engine with two overhead camshafts that actuate the 16 valves via hydraulic tappets excessive carbon accumulation in power... The W204 mileage where you need to know about tuning the Mercedes C-Class with 143HP is about 7 /! Very risky is to achieve stable operation and high torque at low revs, it! Air into the OM646 engine! `` Mercedes-Benz W204, also known the... Cheaper to maintain and repair pour fuel due to excessive carbon accumulation in the description, the. On Life on Four include Amazon affiliate links where we suggest products and product categories but not particularly powerful far! Liner leads to knocking, stopping idling the 4Matic works just fine commonality between the R4 and R5 not!, Mercedes diesel requires oil with a new one shells often need to generous... Not completely removed is reduced to 16.2: 1 4Matic works just fine injectors learn... Important problems with timing drives a bit on engine accessories and launched a generation the...

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