Thank you for visiting! This time, we carried out Stage2 ECU tuning on a Mercedes-Benz S-Class (W222) S300h at “World Motor Hattori,” an authorized mbFAST Tuning dealer in Osaka.
The owner had previously undergone Stage1 tuning and came to us with a clear request: “I want even more power — especially more torque at low RPMs.” We proceeded with an upgrade to Stage2 to fulfill that goal.
From Stage1 to Stage2 — Reaching the Next Level
mbFAST Tuning’s ECU tuning program offers a staged power-up path through Stage1 and Stage2. We’re seeing more and more owners who experienced a significant improvement with Stage1 come back seeking even higher performance with Stage2.
This owner’s requests were clear:
- More power beyond Stage1
- Stronger torque at low RPMs, above all else
To bring out even more of the diesel engine’s hallmark “thick, low-RPM torque,” we applied the Stage2 map.
W222 S300h Stock Specifications (Reference)
- Engine: 2.2L inline-4 diesel turbo + motor (hybrid)
- Max Output: 204 PS (engine) + 27 PS (motor)
- Max Torque: 500 Nm (engine) + 250 Nm (motor)
- Transmission: 7G-Tronic Plus
- Drive: FR (rear-wheel drive)
What Stage2 Tuning Delivers
1. Power & Torque Beyond Stage1
Stage2 goes even further than Stage1 with optimized fuel injection maps and boost pressure adjustments. By focusing heavily on torque in the low-to-mid RPM range, you’ll feel the extra punch from city streets to highways — at every moment of acceleration.
2. Massive Low-RPM Torque Boost
The “low-end torque” this owner wanted most. The instant you press the throttle, the car surges forward with authority — that’s the hallmark of Stage2 tuning, maximizing the diesel engine’s inherent characteristics. From traffic light starts to merging and overtaking, torque is dramatically thicker across the board.
3. Further Improved Throttle Response
Stage2 also revisits the throttle response characteristics, delivering a setup that reacts faster and more directly to the driver’s intent.
4. Optimized Hybrid System Coordination
By optimizing the cooperative control between the S300h’s diesel engine and motor, transitions between EV mode and engine-driven mode become even smoother. The system is tuned so that combined motor and engine torque delivers a thick, powerful response from low RPMs.
“The quiet, refined S-Class — now even more dynamic, even more powerful.” The Stage2-tuned S300h was completed exactly as the owner requested: a car that delivers overwhelming torque right from low RPMs.
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