Why Does Engine Light Come On? Case Study: Mercedes-Benz CLA W117 with M270 Engine The check engine light (CEL) is one of the most common warnings drivers face in modern vehicles. In the Mercedes-Benz CLA W117, equipped with the M270 ...

Mercedes OM654 Engine (2016–Present) The Mercedes-Benz OM654 is the brand’s fourth-generation 2.0L inline-4 diesel engine, introduced in 2016 to replace the OM651. It combines an aluminum block and head, Nanoslide-coated cylinders, variable-geometry turbocharging, and integrated DPF/SCR aftertreatment to meet strict ...