KAY Tuning M177/M178 ECU & TCU Tuning License

Comes with one dongle
Mercedes-AMG Tuning, Straight From Your Phone.

Unlock the full potential of your Mercedes-AMG M177/M178 4.0L Biturbo with KAY Tuning.

Flash your ECU and TCU directly from your phone, at home. Every license includes Stage 1 and Stage 2 ECU tunes with multiple fuel maps, TCU tuning, KAY Ultra, and access to advanced diagnostics and logging features.

No shop visits. No expensive flashing equipment. Just your AMG and your phone.

What's Included

• Stage 1 & Stage 2 ECU Tunes — Both stages included with all available supported octane and fuel-specific calibrations.

• TCU Tuning — Transmission tuning included with your license.

• KAY Ultra — Map switching, flex fuel, and anti-lag.

• Multiple Fuel Maps — Choose between KAY's included calibrations for different supported fuels.

• Flash to Stock — Return your ECU to its supported stock calibration.

• Data Logging — Monitor and record vehicle performance data.

• Read & Clear DTCs — Access vehicle diagnostics directly from your phone.

• Custom Tune Flashing — Flash compatible custom tunes from your preferred tuner.

• iOS & Android Support — Tune directly through the KAY mobile app.

Optional Add-On: CPC Tuning

Stage 1 & Stage 2 — All Supported Fuel Maps Included

Every KAY Tuning license includes both Stage 1 and Stage 2 ECU tunes, along with our available calibrations for different supported fuel types and octane ratings.

Stage 1

Designed for vehicles with factory hardware, delivering improved horsepower, torque, and throttle response.

Stage 2

Designed for vehicles equipped with supporting performance modifications, providing additional performance potential.

Multiple Fuel Maps

Your license includes KAY's available fuel-specific calibrations for both stages, including supported pump gas octane ratings and ethanol blends.

Select the calibration that matches your vehicle's setup and the fuel you're running.

No additional licenses or charges to access Stage 2 or our included fuel maps.

KAY Ultra — Advanced Features Suite

KAY Ultra comes standard with every license, giving you access to advanced tuning capabilities.

Map Switching

Switch between compatible performance maps for different driving conditions, fuels, or setups.

Flex Fuel

Support for compatible flex fuel configurations, allowing calibrations to accommodate changing ethanol content when the required hardware and software are supported.

Anti-Lag

Advanced turbo response functionality for supported performance applications.

KAY Ultra features are included with your license. Individual feature availability depends on vehicle compatibility, calibration, and supporting hardware.

Your Tuner. Your Tunes.

Already working with a tuner you trust? Keep them.

KAY Tuning isn't limited to our included off-the-shelf calibrations.

Flash compatible custom tune files from your favorite tuner directly through the KAY app, without having to visit their shop every time you need an update.

Whether you're running our included Stage 1 and Stage 2 tunes or a custom calibration built specifically for your setup, KAY gives you the flexibility to choose.

Flash to Stock

Return your ECU to its supported stock calibration directly from your phone whenever needed.

No additional flashing equipment or shop appointment required.

Data Logging

Record and review important vehicle performance data directly through the KAY platform.

Monitor your vehicle's performance, review logs, and share recorded data with your tuner to help evaluate your setup and make adjustments.

Read & Clear Diagnostic Trouble Codes

Access supported vehicle diagnostics directly from your phone.

• Read diagnostic trouble codes (DTCs)

• Clear supported fault codes

• Identify potential vehicle issues

• Check faults after modifications or tuning changes

All within the KAY Tuning app.

ECU & TCU Tuning Included

One license gives you access to both engine and transmission tuning for supported vehicles.

ECU Tuning: Engine performance, boost control, throttle response, and power delivery.

TCU Tuning: Transmission calibrations designed to complement your engine tune and improve transmission performance.

Optional CPC Tuning: Available separately for supported vehicles requiring additional CPC calibration.

How It Works

1. Purchase your KAY Tuning license and compatible dongle.

2. Download the KAY Tuning app for iOS or Android.

3. Connect the dongle to your vehicle's OBD port.

4. Choose your Stage 1, Stage 2, or compatible custom tune and select the appropriate available fuel calibration.

5. Flash your AMG directly from your phone.

Vehicle Compatibility

M177 — 4.0L Biturbo V8

• Mercedes-AMG C63 / C63 S (W205)

• Mercedes-AMG E63 / E63 S (W213)

• Mercedes-AMG GLC63 / GLC63 S (X253 / C253)

• Mercedes-AMG G63 (W463A)

• Mercedes-AMG S63 (W222 / C217 / A217)

• Mercedes-AMG GLE63 / GLE63 S (W167)

• Mercedes-AMG GLS63 (X167)

• Mercedes-AMG GT63 / GT63 S 4-Door (X290)

M178 — 4.0L Biturbo V8

• Mercedes-AMG GT

• Mercedes-AMG GT S

• Mercedes-AMG GT C

• Mercedes-AMG GT R

• Mercedes-AMG GT R Pro

• Mercedes-AMG GT Black Series

Compatibility Notice: Listed vehicles are M177/M178 engine applications. ECU and TCU flashing availability, supported fuel maps, diagnostics, and advanced features depend on model year, software version, and vehicle configuration. Verify compatibility before purchase. Stage 2 and certain advanced features require appropriate supporting hardware. Flashing to stock does not necessarily restore an ECU's original lock status or erase programming history.