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ECU Tuning for Mercedes-Benz CLS550 W219 (2012-2020)

(M278 V8 4.7L Biturbo engine)



- ECUPROGRAM tune file

- ECU Tune Install


CLS550 M278 Tuning Potential:


- - STOCK HP & TQ - -

402 HP / 443 FT-LB (600 Nm)


Tuning Options:


- - STAGE 1 - -

510 HP / 627 FT-LB (850 Nm)


- - STAGE 2 - -  [+$200]

545 HP / 690 FT-LB (935 Nm)

Requires CLS550 Mods:

  • Race Downpipe


- - 7G TRONIC TCU Tuning - - [+$1929]

Mercedes Transmission Tuning: 

Enhanced performance and a seamless driving experience.

- Increased torque across all RPMs

- Noticeably smoother shifts and acceleration

- Customizable shift patterns tailored to your needs

- Compatible with any tuning stage

- Higher maximum torque and RPM limits

- Optimized launch control for faster starts

- Elimination of RPM limits in curves

- Faster, firmer gear shifts


Stock power and gains vary based on conditions and state of the vehicle.


The Mercedes-Benz M278 engine is a 4.7-liter twin-turbocharged V8 gasoline engine introduced in 2011, known for its powerful performance, smooth operation, and respectable fuel efficiency. Equipped with direct fuel injection, twin-turbocharging, lightweight aluminum construction, and advanced variable valve timing, the M278 engine delivers impressive horsepower and torque while utilizing Mercedes-Benz's BlueDIRECT technology to enhance combustion efficiency and reduce emissions. Found in various models such as the S-Class, CL-Class, CLS-Class, and GL-Class, the M278 engine has earned a reputation as a refined and powerful V8 engine in the luxury car market.


The Mercedes-Benz 7G-TRONIC PLUS, a seven-speed automatic transmission (internal code: 722.9), features a smooth and efficient operation with its VGSNAG3 third-generation transmission control unit (TCU) managing gear shifts and performance. Known for its improved torque converter and refined gear shifting, the 7G-TRONIC PLUS enhances fuel efficiency, driving comfort, and reduces noise levels. Widely used in various Mercedes-Benz models such as the C-Class, E-Class, and S-Class, this reliable and efficient transmission has earned a reputation for delivering a seamless driving experience for luxury car enthusiasts.


There are several reasons why you might consider tuning, including:


- Increase Horsepower & Torque: The most noticable benefits of tuning your ECU is the increase in horsepower and torque. Even without aftermarket modifications, you can see a significant improvement in your engine's performance, resulting in faster acceleration and a more engaging driving experience.


- Improve Fuel Efficiency: While more HP and TQ is often the primary goal of tuning, many tuning parameters can also result in improved fuel efficiency. By optimizing the engine's performance, you can reduce the amount of fuel needed to accelerate and cruise, saving you money at the pump.


- Enhanced Reliability: By addressing common issues from the factory and making the engine more efficient, you can reduce the risk of breakdowns and extend the life of your vehicle.


Tuning File Fits:

2012 2011 2013 2014 2015 2016 2017 2018 2019 2020

Mercedes Benz CLS550 (4.7 Litres, Turbocharged)

Mercedes CLS550 M278 Tuning (2012-2020)

  • - 7G Tronic TCU Tuning [+$1929]

    In-store service for a personalized experience

    Exclusively designed for automatic transmissions

    Compatible with a wide range of Mercedes models

    Adaptable to various performance stages and upgrades

    Professional installation ensures optimal results


    - Send in your ECU to get tuned and then shipped back

View parts for this car



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Look no further - ECUPROGRAM, your dream Performance Tuning & Upgrade Shop is here! For more information about our ECU tuning services and how it can benefit your vehicle, don't hesitate to reach out to us.

4527 1 St SE, Calgary, AB T2G 2L2, Canada

(403) 457-3650

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