Premature failure of the Balance shaft on the Mercedes M272 engine is a known problem. Apparently the balance shafts were too soft and so they wear out quickly. This was the subject of a class action lawsuit in the United States. Over there, the shafts in affected cars were replaced by the dealer out of warranty. This wasn’t the case here in Australia, although it is possible that a handful were done for good customers. There is a service bulletin published by Mercedes-Benz that outlines the repair and the engines numbers affected by the soft M272 balance shaft. Generally those […]