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M156 ECU Tune
Purchase M156 ECU Tune
  • SKU: 01-000-00169-7

    M156 ECU Tune

  • Advertised gains are estimates of HP and Torque “at the engine” calculated from gains as measured on a Dynojet Dynamometer in ideal conditions and typically show the largest possible change.  Actual gains are dependent on the following: Learn More about Crank HP Vs Wheel HP

    Model – Manufacturers use the same engine in multiple model vehicles and often times they are in a different state of tune, for example: 2008 C63 and a 2008 CLK Black Series.  Both have the same engine, but the C63 has 451hp while the CLK63 has 500hp.  Naturally the C63 will show more gains as it starts at a lower level.

    Model Year – Similar to above, as time progresses, Manufacturers tend to slightly increase power output via software from one year to the next or offer “Performance Packages” with increased power.  The engines remain largely unaltered and as a result, final tuned output remains the same, while the gains are lower as the starting point is now higher.

    Fuel – Fuel quality is HIGHLY important with performance vehicles.  Low quality and/or low octane fuel will greatly impact engine output and potentially even engine health.  Top tier brand premium fuels should always be used to achieve the best results possible.

    Drivetrain – All wheel drive has higher drivetrain losses than rear wheel drive.  This results in lower numbers when testing on a chassis dyno.  Wheel/tire size and weight will also impact chassis dyno results

    Weather/Conditions – Temperature, humidity, altitude, and air density all impact engine performance.  Heat, high humidity, and thin air will all work towards reducing engine output

    Engine Health – Higher miles tends to result in increased build up and lower compression which can and will impact engine output.  Properly maintained engines will have better performance than abused or neglected engines.

    Supporting modifications – The highest power levels require supporting modifications.  Depending on the engine, this could mean forged internals, built transmission, upgraded fuel system, 110+ octane race fuel, etc.

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  • CARB EO: D-691-3
  • Prop 65 warning

    This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to

Weistec Horsepower 520
Weistec Torque 464
CARB Exempt ID D-691-3
Manufacturer Weistec
Street legal in all the US States Yes
Engine Family M156
See more
year make model trim engine
2014 Mercedes-Benz C63 AMG Coupe (C204) NA 6.2L V8 (M156)
2013 Mercedes-Benz C63 AMG Coupe (C204) NA 6.2L V8 (M156)
2012 Mercedes-Benz C63 AMG Coupe (C204) NA 6.2L V8 (M156)
2011 Mercedes-Benz C63 AMG Coupe (C204) NA 6.2L V8 (M156)
2010 Mercedes-Benz C63 AMG Coupe (C204) NA 6.2L V8 (M156)
2009 Mercedes-Benz C63 AMG Coupe (C204) NA 6.2L V8 (M156)
See more

Product Description

ECU Tuning Process: How do I get my ECU tuned?

As a leader in tuning and calibration, Weistec Engineering is proud to offer tuning packages for the naturally aspirated M156/M159 vehicle lineup.

We have created a strong yet reliable tuning solution that utilizes the same calibration technology that has been applied to our Supercharger System. With a keen understanding for optimal running conditions for the M156, we have revised many features of the ECU which creates a significant increase in horsepower to the wheels on 91 octane and is street legal.

CARB EO# D-691-3

The Weistec Upgrade Promise

Customers who purchase our ECU Upgrades will receive credit towards the purchase of any Weistec M156 Supercharger System, if you are thinking of supercharging your car in the future and are not ready for the purchase, this is a good way not to spend money twice while making more power right away.

ECU Tuning Process: How do I get my ECU tuned?

Key Features:

  • Increased Horsepower

  • Increased Torque

  • Eliminate Top Speed Limiter

  • Increased Throttle Response

  • Optimized Fuel and Spark

  • Credit towards M156 Supercharger Systems

*Power gains vary based on model, modifications, fuel, and running conditions.

Tuning Process: Cypher Handheld Tuner