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

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

Up to 541 HP and 751 lb-ft with safe, OEM-level calibration.*

This custom ECU tune unlocks the full potential of Mercedes’ M278 4.7L BiTurbo, delivering massive increases in horsepower, torque, and throttle response while preserving factory safeguards. Designed specifically for E-Class, CLS-Class, S-Class, CL-Class, and ML-Class models equipped with the M278 engine.

💥 Key Benefits

• +139 HP / +290 lb-ft: Among the highest proven gains for the M278 platform.
• Factory Safety Retained: Knock control, fuel trims, boost protection, and temperature limits remain active.
• Sharper Response: Better throttle feel and stronger mid-range acceleration.
• Full OEM Integration: No piggybacks — proper ECU calibration using factory-grade tools.
• Optional Mapping: Optimized versions available for downpipes, 93 octane, or supporting mods.

📌 Compatible Mercedes-Benz Models (M278 4.7L BiTurbo)

• 2012–2018 E550
• 2012–2018 CLS550
• 2012–2017 S550
• 2012–2014 CL550
• 2012–2015 ML550

🔧 How the Process Works

Your ECU file is read, calibrated, and flashed using OEM-level equipment. Boost targets, ignition timing, torque limits, and fuel delivery are optimized for safe, consistent gains. No wiring, piggyback boxes, or unreliable modules.

🎯 Performance Gains

• Stock: ~402 HP / 516 lb-ft
• Tuned: ~541 HP / 751 lb-ft
• Total Gain: +139 HP / +290 lb-ft

*Actual results vary based on fuel quality, altitude, and vehicle condition.