Mercedes M276/M278/M157 Custom Tuning — MED17.7

Mercedes M276/M278/M157 Custom Tuning

Custom calibration for supported Mercedes-Benz and AMG turbo applications, built around turbo hardware, fuel system, intercooling, transmission, and power-delivery goals.

Supported applications

Common M276 V6, M278 V8 and AMG M157 V8 applications in C, E, CLS, S, CL, SL, GLE/ML, GLS/GL and related chassis.

Supported control units and access

Common supported families include Bosch MED17.7.1, MED17.7.2, MED17.7.3 and MED17.7.3.1. HexProg II publishes read/write coverage for these controllers, and StageX lists DTC plus extensive mappack coverage for MED17.7 variants. Exact ECU/TCU identification, software version, and read/write method are confirmed after purchase. Some vehicles can be flashed through OBD; others may require bench or boot access.

Choose the service level

• Calibration Level: Select the option that matches the installed hardware. Stage names describe service scope, not a guaranteed power figure.
• Drivetrain Service: Engine-only or engine plus a supported transmission calibration.
• DTC Review: Choose no DTC changes or a review of supported non-emissions diagnostic codes. This option does not include disabling required emissions or safety systems on street vehicles.

Included service

• Build, fuel, hardware, and stock-file review
• One confirmed hardware configuration and one primary fuel setup
• Scheduled remote connection or file workflow, datalog review, calibration changes, and revisions inside the purchased block
• Fuel, ignition, airflow/load, torque, boost, throttle, drivability, and supported transmission strategies as applicable

Included time: Stage 1 — up to 4 hours. Stage 2 — up to 5 hours. Upgraded Turbos — up to 6 hours. Time includes setup review, connecting, logging, calibration work, revisions, troubleshooting, and communication.

After purchase and scheduling

Our team will email the address used at checkout to confirm the vehicle, ECU/TCU, hardware, fuel, tuning goals, required files, and an available appointment time. Text or phone follow-up may be used when needed. Sessions are scheduled in Eastern Time.

Before the appointment

The vehicle must be mechanically complete, leak-free, fueled correctly, and ready to produce repeatable logs. A compatible interface, cable, software license, ECU/TCU unlock, bench service, and dyno rental are separate unless specifically stated.

Time and revision policy

This is a scheduled professional service, not an open-ended support window. Mechanical faults, communication problems, incomplete hardware, or incorrect fuel can consume the purchased time. Work beyond the included block must be purchased as Additional Calibration Time and scheduled before tuning continues. Major hardware or fuel changes may require additional time or a new calibration.

Specific power is not guaranteed. Results depend on vehicle condition, hardware, fuel quality, environment, and safe operating limits. Customers are responsible for legal and emissions compliance.