Mercedes EC-Class W213 Mild Hybrid Diesel OM654.029 654 Engine

Mercedes E-Class W213 – Complete Mild Hybrid Diesel Engine | OM654.029 | 48V EQ Boost | OEM Specification | Direct Replacement
Secure an outstanding and highly sought-after engine solution for the sophisticated and technologically advanced Mercedes-Benz E-Class W213 — a complete mild hybrid diesel engine featuring the highly acclaimed OM654.029 unit — Mercedes-Benz’s most advanced, most technologically sophisticated, and most comprehensively engineered diesel mild hybrid powerplant, combining the legendary refinement, efficiency, and reliability credentials of the OM654 diesel family with the advanced 48-volt EQ Boost mild hybrid technology that represents the very cutting edge of modern diesel powertrain engineering. An exceptional replacement solution for workshops, specialist dealers, and owners seeking a genuine factory-grade mild hybrid diesel engine with complete confidence in quality, specification accuracy, and long-term performance.
The Mercedes-Benz OM654.029 represents a significant and meaningful evolution of the celebrated OM654 diesel engine family — integrating the advanced 48-volt mild hybrid EQ Boost system into the already exceptional OM654 diesel architecture to create a powertrain of extraordinary technological sophistication that advances the art of diesel engine engineering across multiple dimensions simultaneously. The OM654 base engine brings all of the groundbreaking technological advances that have made this family the most celebrated and most widely respected diesel engine generation in Mercedes-Benz history — the innovative all-aluminium construction delivering significant weight savings, the advanced variable geometry turbocharging providing responsive and linear power delivery, the state-of-the-art common rail direct injection ensuring outstanding combustion efficiency and fuel economy, and the fully integrated Euro 6d emissions management system guaranteeing complete regulatory compliance for unrestricted operation in all European clean air zones.
The 48-volt EQ Boost mild hybrid system integrated into the OM654.029 represents the most significant and most technologically impactful advancement of the OM654 architecture — a sophisticated mild hybrid system that adds an integrated starter-generator unit, a 48-volt lithium-ion battery, and a comprehensive energy management system to the base OM654 diesel engine, creating a powertrain of substantially enhanced efficiency, refinement, and performance capability. The integrated starter-generator of the EQ Boost system replaces the conventional alternator and starter motor with a single, more capable, and more sophisticated unit that performs both functions while additionally providing an electric boost function — delivering up to 16kW of additional electric power to supplement the diesel engine’s output during acceleration and high-load situations, providing a meaningful and immediately appreciable improvement in throttle response, mid-range performance, and overall drivability that makes the OM654.029 mild hybrid a significantly more responsive and more engaging powertrain than the standard diesel equivalent.
The 48-volt EQ Boost system also enables enhanced energy recuperation during deceleration and braking — capturing kinetic energy that would otherwise be lost as heat through the braking system and converting it into electrical energy stored in the 48-volt battery for subsequent use by the integrated starter-generator, the 48-volt electrical consumers, and the belt-driven ancillary systems. This recuperation capability contributes meaningfully to the outstanding real-world fuel efficiency of the OM654.029 mild hybrid — delivering measurably improved fuel consumption figures in real-world driving conditions, particularly in the urban and mixed-cycle use patterns where the E-Class W213 is most frequently operated, and providing a genuinely significant contribution to reduced running costs and improved environmental performance over the full operational life of the powertrain.
The coasting function enabled by the EQ Boost system — where the engine is automatically and seamlessly shut down during deceleration and coasting phases and instantly and imperceptibly restarted when required — provides a further dimension of fuel efficiency improvement and emissions reduction that contributes to the OM654.029’s outstanding real-world efficiency credentials. The quality of the engine restart through the integrated starter-generator is a particular achievement of the EQ Boost system — so smooth, so fast, and so completely imperceptible that it is entirely invisible to the driver and passengers, preserving the supreme refinement and comfort standards of the E-Class W213 throughout all driving conditions including the most frequent start-stop cycles of urban use.
Every internal and external component of this complete OM654.029 mild hybrid engine — including the precision-engineered diesel engine assembly with all internal components, the integrated starter-generator unit, the 48-volt battery and energy management system, the variable geometry turbocharger, the high-pressure common rail injection system, the EGR system, and all ancillary systems and sensors — is present and complete, delivering a fully comprehensive and immediately ready-to-install mild hybrid diesel powertrain solution.
Technical Specifications:
Engine: Mercedes-Benz OM654.029
System: 48V EQ Boost Mild Hybrid Diesel
Compatible Model: Mercedes-Benz E-Class W213
Specification: OEM Factory Grade
Fitment: Direct OEM replacement
Please verify compatibility using your vehicle’s VIN or engine code before ordering. Professional installation by a qualified Mercedes-Benz technician with mild hybrid system expertise is strongly recommended to ensure correct fitment, full EQ Boost system functionality, and optimal performance of all hybrid components.
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