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When you press the accelerator in a Mercedes-Benz sedan and experience its smooth yet powerful acceleration, there's a good chance you're feeling the performance of an M276 engine. This powerplant plays a crucial role in Mercedes-Benz's vehicle lineup, yet surprisingly lacks its own dedicated Wikipedia entry—likely because information about it is scattered across various model-specific pages. This article provides a comprehensive examination of the M276 engine's technical specifications, applications, and its significance in Mercedes-Benz's engineering evolution.

The M276 represents Mercedes-Benz's advanced V6 gasoline engine designed to replace the previous M272 series. This engine marks a significant technological leap for the automaker, delivering improved fuel efficiency, enhanced power output, and reduced emissions. Incorporating numerous cutting-edge technologies, the M276 stands out among its competitors in the premium engine segment.

The M276's most notable feature is its turbocharging system. Unlike naturally aspirated engines, turbocharging dramatically increases power output. The M276 typically employs twin turbochargers—one for each cylinder bank—a configuration that minimizes turbo lag while improving throttle response. Additional advanced technologies include:

• Direct Injection: Fuel is precisely injected directly into combustion chambers, allowing optimal control of fuel delivery and timing for improved efficiency and reduced emissions.
• Multi-Spark Ignition: This system generates multiple sparks per combustion cycle, enhancing stability and efficiency.
• Variable Valve Timing: Adjusts valve operation timing based on driving conditions to optimize airflow and performance.
• Lightweight Construction: Aluminum block and cylinder heads reduce weight while improving fuel economy and handling.

The 3.5L V6 variant commonly found in C-Class, E-Class, and S-Class models delivers approximately 306 horsepower and 370 Nm of torque, praised for its refined power delivery and efficiency.

This 3.0L twin-turbo version produces around 333 horsepower and 480 Nm of torque, offering more aggressive acceleration for performance-oriented models.

The range-topping 4.0L twin-turbo variant reserved for AMG models exceeds 400 horsepower and 500 Nm of torque, delivering exceptional performance for high-end vehicles.

Output figures may vary depending on specific vehicle applications and tuning configurations.

• C-Class (W204/W205): Enhanced the entry-level sedan's driving dynamics
• E-Class (W212/W213): Balanced performance for executive and family use
• S-Class (W221/W222): Delivered the expected luxury driving experience
• CLS-Class (C218/C219/C257): Powered the stylish four-door coupe
• SUV Models: Provided capable performance in GLK, GLE, and GLS models
• SLK/SLC (R172): Brought spirited performance to the roadster lineup

• BMW's N55/B58 inline-six engines (noted for smoothness)
• Audi/Volkswagen's EA837 V6 turbo engines
• Infiniti's VQ-series V6 (renowned for reliability)

• Regular oil/filter changes
• Timely air filter replacement
• Scheduled spark plug service
• Cooling system inspections
• Use of premium fuel

While facing competition from electrification, the M276's technological advancements will influence future Mercedes-Benz powertrain development as internal combustion engines continue evolving alongside alternative propulsion systems.