![]() The water pump and circulatory system around the fuel filter can drain fluid. Cooling System ProblemĪ known problem with the 2.1 CDI OM651 diesel engine is a leak in the cooling system. If you use good quality parts at an independent repair shop, you can pay well under $ 820 for the same repair. So, for the replacement, the whole machine had to be removed! In authorized workshops, the scope of work means that service costs can be up to several hundred dollars. Well, the drive is located on the side of the gearbox. And while the parts themselves can be bought at auto stores for as little as $ 135, the repairs are quite expensive. However, leaks are not the only problem with the time chain. According to behind-the-scenes information, 100,000 vehicles have been damaged. This oil is leaking in the tensioner area.ĭue to significant lubricant losses and can quickly affect the time drive conditions themselves, the Germans should announce other remedial actions. Soon it turned out that another defect involved the time chain seal. Ignoring the issues with the OM651 CDI’s more powerful 2.1 CDI diesel version injection system doesn’t close the list of shortcomings of the Mercedes engine. Bosch electromagnetic devices can be repaired for 80-108 dollars. In comparison, the new Delphi injector costs $ 450. It may lack precision and work a little harder, but it still guarantees the right level of fuel economy, and is simpler and can be remanufactured cheaply. ![]() ![]() Where did the application come from? 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. And all of them indicate that it is not completely removed. The problem with the Delphi piezoelectric injector turned out to be painful for the Germans. The repair costs exceed half a billion euros. More than 300,000 vehicles appear on the website. The summary of the corrective action is terrifying. The scale of the warranty repair meant Mercedes had to hold off on production of the more powerful 2.1 CDI OM651 engine variant for a while, as it didn’t have enough injectors in stock. At the turn of 20, 4.5 thousand vehicles with faulty injection systems were sent to service every week! ![]() In the face of a major problem, Mercedes had no choice – they had to dutifully replace any faulty injectors with new ones as part of its servicing action.ĭespite the good attitude of the German brand, it quickly turned out that the problem was enormous. Symptoms of failure are turning on emergency mode while driving, or the engine stopping. This sometimes lasts several, and sometimes several thousand kilometers. 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. 2.1 CDI OM651 Installed onĭuring 9 years of production, OM651’s 2.1 CDI engine was installed on the following models:Īlthough 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. Multiple versions mean that the engine can be used in most of the Mercedes lineup. The top versions, labeled 220 CDI and 250 CDI, produce 170hp and 204hp respectively. He base models have a herd of 120hp, 136hp or 143hp.
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