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Performance ECU software upgrade improves horsepower, torque, and driving characteristics of the M178 4.0L V8 Bi-Turbo Engine by reprogramming various sensor inputs, air/fuel ratios, and boost pressure.                                 

NOTE: This is not a physical/shipped product.  This upgrade requires you to send us your ECU for re-programming.  You will be emailed a download link with detailed instructions after adding this to your cart and checking out.

SHIPPING DETAILS: Shipping costs for sending an ECU to 1K Motorsports is the responsibility of the purchaser.  The ECU will be tuned within 24-48 hours of receiving it and 1K Motorsports will then ship back the ECU using whatever method it was shipped in with.  (For example: If you send in your ECU via Ground shipping, we will ship it back via Ground.  If you ship it via Overnight, we will ship it back via Overnight.)


  • Fits all Mercedes-Benz AMG 63 M178 4.0L Bi-Turbo Vehicles: C-Class / E-Class / S-Class / GLC-Class / GT / G-Class
    • POWER GAINS: +80WHP  +125WTQ LB-FT (+94hp +143TQ LB-FT at crank)
    • +100WHP  +165WTQ LB-FT (Stage 2 with Catless Downpipes) (+115HP +189TQ LB-FT at crank)
  • 1K Motorsports saves your stock/factory ECU settings so that you can revert your vehicle back to stock settings at any time