Mercedes-Benz ML350 BlueTEC - Unlocking the Full Potential of the OM642
The Mercedes-Benz ML350 BlueTEC is powered by the legendary OM642 3.0-litre V6 turbo-diesel, an engine renowned for its smooth power delivery, low-end torque, and long-term durability. Originally developed for use across Mercedes’ premium SUV and executive line-up, the OM642 delivers refinement and strength in equal measure, but like most factory calibrations, it’s intentionally conservative to satisfy global emissions and fuel targets.
Refining the OM642
Through precise recalibration, we refine the OM642’s fuelling strategy, torque model, and throttle mapping to unlock its true potential. The result is sharper throttle engagement, a more assertive torque curve, and smoother, more consistent acceleration that feels entirely natural, as though Mercedes themselves had signed off the final version. 
Engineering Harmony
The OM642’s architecture is a showcase of durability and sophistication, a compacted graphite iron block, aluminium heads, and a variable-geometry turbocharger that delivers clean, linear boost. Our tuning doesn’t push those systems harder; it optimises how they work together. Torque arrives earlier, holds longer, and maintains stable air-fuel ratios for more efficient, consistent combustion.
What stands out most is refinement. There’s no harshness or drama, just clean, confident torque that transforms the ML350 from capable to truly effortless, particularly when towing, climbing gradients, or overtaking on open roads.
OEM-Level Precision
At AutoUpgrades, every OM642 calibration follows OEM-grade methodology. All factory safety strategies including boost, torque, and thermal management remain fully operational. Each tune is engineered to work in complete harmony with the vehicle’s drivetrain and 7G-Tronic transmission, maintaining the refinement and reliability that define the Mercedes-Benz brand. 
Effortless Power, Refined
The result is exactly what an ML350 should be; powerful, composed, and efficient. When calibrated correctly, the OM642 delivers effortless torque with factory-level smoothness and improved responsiveness throughout the rev range. It’s performance, perfected with precision.
Explore the Mercedes-Benz ML350 BlueTEC Tune here and experience how engineering-led calibration brings out the full potential of one of Mercedes’ finest diesel engines.