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    M157 ECU Upgrade


    Availability: In stock


    M157 ECU Upgrade

    +139 Wheel Horsepower, +186 Wheel Torque!

    As the global leader in Mercedes AMG tuning and calibration, Weistec Engineering once again sets the standard for bi-turbo M157 performance calibration. Fully developed in-house, our ECU tune has surpassed the 600 wheel horsepower mark on a completely stock vehicle with no other modifications. This is the most powerful ECU upgrade ever released! What's even more incredible is that it is 100% street legal!

    CARB EO# D-691-1

    With a keen understanding for optimal running conditions for the M157, we have revised many features of the factory ECU programming which creates an astounding 608 horsepower and 660 torque at the wheels on California pump 91 octane all while being street legal.

    Key Features:

    • +139 Wheel Horsepower

    • +186 Wheel Torque

    • Eliminate Top Speed Limiter

    • Increased Throttle Response

    • Optimized Boost, Fuel and Spark

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

    PDF Filem157-m278_ecu_removal_2 (380.7 KB)Download


    This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.
    Some Weistec Engineering performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). For state specific details please visit the following website.
    It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.
    All performance modifications and installations are at the customer’s own risk. Weistec Engineering holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.


    WARNING: Cancer and Reproductive Harm