Description
Unlock the full potential of your Mercedes M278 bi-turbo engine with the Weistec M278 ECU Tune, the most powerful ECU upgrade ever released for the M278 engine. Developed entirely in-house, this tuning solution provides massive power gains while maintaining reliability and compliance with CARB EO# D-691-1 standards. Perfect for enthusiasts seeking unparalleled performance, this tune transforms your driving experience.
Performance Gains:
-
Stage 1 (W.1):
- Power Gain: Up to +111 HP
- Torque Gain: Up to +272 TQ
-
Stage 2 (W.2):
- Power Gain: Up to +124 HP
- Torque Gain: Up to +282 TQ
Achieve an incredible 540 horsepower and 715 Ft-Lbs of torque on a completely stock M278 engine running 91 octane fuel, all while remaining street-legal.
Enhanced Driving Dynamics:
- Eliminated Top Speed Limiter for unrestricted performance.
- Improved Throttle Response for instant and precise feedback.
- Optimized Boost, Fuel, and Spark for maximum efficiency and power.
Why Choose the Weistec M278 ECU Tune?
This ECU upgrade reflects months of rigorous development and testing, both on the dyno and the road. Weistec's meticulous calibration delivers consistent and reliable performance gains across the entire powerband, ensuring your bi-turbo V8 engine performs at its peak potential.
Key Features:
- 540 HP and 715 TQ on stock components.
- Fully compliant with CARB EO# D-691-1 for street-legal performance.
- Custom calibration tailored to the M278’s unique characteristics.
- Backed by Weistec’s reputation for innovation and reliability.
Cypher handheld tuner is not compatible with 2020+ models.
Notes:
- Power gains may vary based on model, modifications, fuel, and driving conditions.
Elevate your Mercedes’ bi-turbo engine to new heights with the Weistec M278 ECU Tune. Designed for enthusiasts who demand exceptional power and refinement, this upgrade delivers a thrilling and dynamic driving experience.
Vehicle application:
2020 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2019 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz SL500 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2020 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2019 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz SL550 Roadster (R231) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz E500 T-Modell (S212) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz E500 T-Modell (S212) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz E500 T-Modell (S212) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz E500 T-Modell (S212) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz E500 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz E500 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz E500 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz E500 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz E500 Cabrio (A207) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz E500 Cabrio (A207) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz E500 Cabrio (A207) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz E500 Cabrio (A207) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz E500 Cabrio (A207) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz E500 Base (W212) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz E500 Base (W212) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz E500 Base (W212) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz E500 Base (W212) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz E500 Base (W212) Twin Turbo 4.7L V8 (M278)
2019 Mercedes-Benz GLS500 Base (X166) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz GLS500 Base (X166) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz GLS500 Base (X166) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz GLS500 Base (X166) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz GLS500 Base (X166) Twin Turbo 4.7L V8 (M278)
2020 Mercedes-Benz GLE500 Base (W166) Twin Turbo 4.7L V8 (M278)
2019 Mercedes-Benz GLE500 Base (W166) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz GLE500 Base (W166) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz GLE500 Base (W166) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz GLE500 Base (W166) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz GLE550 Coupe (C292) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz GLE550 Coupe (C292) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz GLE550 Coupe (C292) Twin Turbo 4.7L V8 (M278)
2020 Mercedes-Benz GLE550 Base (W166) Twin Turbo 4.7L V8 (M278)
2019 Mercedes-Benz GLE550 Base (W166) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz GLE550 Base (W166) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz GLE550 Base (W166) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz GLE550 Base (W166) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz GL500 Base (X166) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz GL500 Base (X166) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz GL500 Base (X166) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz GL550 Base (X166) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz GL550 Base (X166) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz GL550 Base (X166) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz GL450 Base (X166) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz GL450 Base (X166) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz ML500 Base (W166) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz ML500 Base (W166) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz ML500 Base (W166) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz ML500 Base (W166) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz ML550 Base (W166) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz ML550 Base (W166) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz ML550 Base (W166) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz ML550 Base (W166) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz S500 Base (W222) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz S500 Base (W222) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz S500 Base (W222) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz S500 Base (W222) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz S500 Base (W221) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz S500 Base (W221) Twin Turbo 4.7L V8 (M278)
2011 Mercedes-Benz S500 Base (W221) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz S550 Coupe (C217) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz S550 Coupe (C217) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz S550 Coupe (C217) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz S550 Coupe (C217) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz S550 Base (W222) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz S550 Base (W222) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz S550 Base (W222) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz S550 Base (W222) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz S550 Base (W221) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz S550 Base (W221) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz CL500 Coupe (C216) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz CL500 Coupe (C216) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz CL500 Coupe (C216) Twin Turbo 4.7L V8 (M278)
2011 Mercedes-Benz CL500 Coupe (C216) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz CL550 Coupe (C216) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz CL550 Coupe (C216) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz CL550 Coupe (C216) Twin Turbo 4.7L V8 (M278)
2011 Mercedes-Benz CL550 Coupe (C216) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz CLS500 Shooting Brake (X218) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz CLS500 Shooting Brake (X218) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz CLS500 Shooting Brake (X218) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz CLS500 Shooting Brake (X218) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz CLS500 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz CLS500 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz CLS500 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz CLS500 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz CLS500 Shooting Brake (X218) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz CLS500 Shooting Brake (X218) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz CLS500 Shooting Brake (X218) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz CLS500 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz CLS500 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz CLS500 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2011 Mercedes-Benz CLS500 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2018 Mercedes-Benz CLS550 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2017 Mercedes-Benz CLS550 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz CLS550 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz CLS550 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz CLS550 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz CLS550 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz CLS550 Coupe (C218) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz E550 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz E550 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz E550 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz E550 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz E550 Coupe (C207) Twin Turbo 4.7L V8 (M278)
2016 Mercedes-Benz E550 Base (W212) Twin Turbo 4.7L V8 (M278)
2015 Mercedes-Benz E550 Base (W212) Twin Turbo 4.7L V8 (M278)
2014 Mercedes-Benz E550 Base (W212) Twin Turbo 4.7L V8 (M278)
2013 Mercedes-Benz E550 Base (W212) Twin Turbo 4.7L V8 (M278)
2012 Mercedes-Benz E550 Base (W212) Twin Turbo 4.7L V8 (M278)
ECU Tuning Process: How do I get my ECU tuned?
