Alpha Performance Mercedes-Benz M278 4.6L Tune

An Alpha calibration file will take full advantage of your 4.6L BiTurbo’s ability. By precisely adjusting camshaft timing, boost output  and air/fuel ratios, your M278 equipped 550 series will produce an incredible 575 horsepower with no other form of modification! This service is solely available via appointment in-house at AMS Performance. Call to schedule today!


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SKU ALP.18.13.0001-1 Categories , Brand:

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Additional information

Race / Competition / International Use Only

This product is designed for installation on a race-only vehicle, defined as a vehicle that is used exclusively for competition and that cannot be licensed or registered for use on the public roads and highways within the United States. This product is not available for sale on emissions-controlled vehicles within the United States without a completed AMS Race Waiver form. International users outside of the United States should act in accordance with their local laws and regulations.

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With 23 years of documented research and development in the forced induction field, AMS Performance has proven itself as the powerhouse in the automotive aftermarket. Our award winning performance systems are what all others are measured by.

550 Series V8 (CL,CLS,E,GL,ML,S,SL) – Calibration

With its stout design, the Mercedes Benz 4.6L V8 Biturbo engine provides excellent luxury class power for the 2011+ Mercedes-Benz lineup. The stock output of the M278 engine is rated at 402 horsepower and 443 torque or slightly more, but these engines are quite underrated from the factory.

More power than the 991 Turbo, made easy. An Alpha calibration file will take full advantage of your 4.6L BiTurbo’s ability. By precisely adjusting camshaft timing, boost output  and air/fuel ratios, your M278 equipped 550 series will produce an incredible 575 horsepower with no other form of modification!

Unleash the power the factory held back. Order your Alpha Calibration today!


Mind numbing torque at your command

What’s even more impressive when having an Alpha file installed on your 550 Series Mercedes-Benz is the monstrous torque that you will have on command. Through our non-invasive update to the powertrain control module (PCM), your AMG will produce 660 ft-lbs of torque! To put this in perspective, that’s a 98 ft-lb gain! More importantly, power is dramatically increased throughout the engine’s entire rpm range. Our Alpha file will provide you with power that you can feel no matter what rpm you decide to punch the throttle.

Our race winning experience creates higher standards

At Alpha tuning we write our own files and use our years of race winning experience to bring something new to the market. Such knowledge allows us to optimize every aspect of the way that your car drives. We calibrate your ECU with a level of expertise that most others simply do not possess. Making finely tuned adjustments to cam timing, fueling, ignition timing, load control, throttle mapping and boost with a real focus on the overall effect to the driving experience, instead of just loading in a canned tune that is commercially available. What’s more is that we are able to provide you the highest level of performance with no sacrifice to reliability.

Exclusive Benefits

  • 575 HP / 660 FT-LBS Of Torque
  • Improved Throttle Response
  • Smooth Power Delivery
  • Stock-Like Driveability
  • Intercooler Pump Optimized
  • Speed Limiter Removed
  • OBD II Emissions Compliant
  • Safe, Proven & Tested Results


Not your typical generic tuning solution

Most tunes available are generic, re-branded, “solutions” that come from one of a few sources. Typically these tunes are developed more by software engineers than seasoned race engine specialists. As an enthusiast why would you settle for the same run of the mill results?


  • 2011–2017 Mercedes-Benz S-Class (S500 in Europe, S550 in the US)
  • 2011–2014 Mercedes-Benz CL-Class (CL500 in Europe, CL550 in the US)
  • 2015-2017 Mercedes-Benz S-Class Coupe/Cabriolet (S500 in Europe, S550 in US)
  • 2011–2018 Mercedes-Benz CLS-Class (CLS500 in Europe, CLS550 in the US)
  • 2012–2020 Mercedes-Benz SL-Class (SL500 in Europe, SL550 in the US)
  • 2012–2014 Mercedes-Benz E-Class (E500 in Europe, E550 in the US)
  • 2012-2014 Mercedes-Benz M-Class/GLE-Class (ML500/GLE500 in Europe, ML550 in US)
  • 2013–2014 Mercedes-Benz GL-Class (GL450 in Europe and US)
  • 2013–2019 Mercedes-Benz GL-Class/GLS-Class (GL500/GLS500 in Europe, GL550/GLS550 in the US)

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