FabSpeed Mercedes-Benz AMG 43 3.0L V6 Bi-Turbo ExperTune Performance Software



Performance ECU software upgrade improves horsepower, torque, and driving characteristics of the M276 3.0L V6 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 Fabspeed is the responsibility of the purchaser.  The ECU will be tuned within 24-48 hours of receiving it and Fabspeed 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 43 M276 3.0L V6 Bi-Turbo Vehicles: C-Class / E-Class / SLC-Class / GLC-Class / GLE-Class

    • Stock - 362 HP / 384 TQ

    • Tuned - 427 HP / 454 TQ

  • Fabspeed Motorsport saves your stock/factory ECU settings so that you can revert your vehicle back to stock settings at any time