Custom ECU Tuning for M278 4.7L V8 BiTurbo – E550, CLS550, S550, CL550, ML550

Gain up to 541 HP and 751 lb-ft with our precision ECU calibration.*

Unlock the full potential of your M278-powered Mercedes with our custom ECU tuning. Designed specifically for the 4.7L BiTurbo engine, our tune improves horsepower, torque, and responsiveness without compromising reliability.

💥 Why Choose Our M278 Tune?

• +139+ HP / +290+ lb-ft Gains: Exceeds industry benchmarks from the most reputable Mercedes tuners.
• OEM-Level Reliability: Keeps factory safety parameters in place.
• Improved Throttle & Boost: Sharper response and more usable torque across the rev range.
• Invisible to Dealerships: Tuned via factory ECU tools with secure checksums — undetectable under normal diagnostics.
• Tailored to You: Custom tuning options for exhaust, downpipes, fuel upgrades, or 93 octane fuel.

📌 Compatible Models

• Mercedes-Benz E550 (2012–2018)
• Mercedes-Benz CLS550 (2012–2018)
• Mercedes-Benz S550 (2012–2017)
• Mercedes-Benz CL550 (2012–2014)
• Mercedes-Benz ML550 (2012–2015)

🔧 How It Works

We extract the factory ECU code, apply a custom calibration to optimize ignition timing, boost targets, torque limits, and fuel delivery, and flash it back to your vehicle. This is done using factory-grade tools — no piggybacks, no compromises.

🎯 Proven Results

• Stock: ~402 HP / 516 lb-ft
• Our Tune: ~541 HP / 751 lb-ft
• Increase: + 139 HP / + 290 lb-ft

*Results may vary slightly depending on fuel quality, elevation, and supporting modifications.

📞 Questions?

We’re happy to answer any questions or walk you through the process. Just email us here.