Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the full potential of your 2020-2025 Mercedes-Benz A45 AMG and A45 S AMG with the GCA Performance ECU Tune. Designed by German Car Accessories (GCA) under our performance division, this custom ECU calibration transforms the driving experience by optimizing power delivery, throttle response, and overall engine performance.
Engineered specifically for the W177 A45 AMG 2.0L Turbocharged M139 engine, this tune enhances the vehicle’s response with stronger acceleration, increased torque delivery, and improved performance throughout the entire RPM range. Whether you're driving on the street or pushing your AMG on the track, the optimized calibration allows the M139 engine to perform at its full potential.
GCA Performance securely saves your factory ECU data, allowing you to restore your vehicle back to stock settings at any time. Each calibration is tailored to your fuel quality and vehicle configuration to provide reliable, optimized performance.
For vehicles equipped with upgraded downpipes, Stage 2 tuning is available with GCA Performance Downpipes. Stage 2 calibration is included at no additional charge. Downpipe readiness and check engine light suppression are available for off-road applications only.
The A45 AMG comes equipped with factory torque and horsepower limitations. To maximize performance gains, a CPC module upgrade is recommended. Vehicles manufactured after June 2020 may require an ECU unlock before tuning can be completed.
We Stand Behind Our Products
- All GCA Performance ECU Tunes include a 1-Year Warranty.
Features
- Custom GCA Performance ECU calibration
- Designed specifically for Mercedes-Benz W177 A45 AMG models
- Optimized for the M139 2.0L Turbo engine
- Improved throttle response
- Increased horsepower and torque output
- Enhanced turbocharger performance
- Stronger acceleration and mid-range pull
- Optimized power delivery throughout the RPM range
- Factory speed limiter removal
- Octane-specific calibration
- Adjustable exhaust burble settings
- Configurable cold start behavior (On/Off)
- Downpipe readiness with CEL suppression (off-road use only)
- Stage 1 and Stage 2 tuning available
- Factory ECU data backup and restoration
- 100% reversible back to stock
- Remote tuning via supplied cable
Vehicle Fitment
Fits:
- 2020 Mercedes-Benz A45 AMG
- 2021 Mercedes-Benz A45 AMG
- 2022 Mercedes-Benz A45 AMG
- 2023 Mercedes-Benz A45 AMG
- 2024 Mercedes-Benz A45 AMG
- 2025 Mercedes-Benz A45 AMG
Models:
- Mercedes-AMG A45 AMG
- Mercedes-AMG A45 S AMG
Chassis:
- W177
Engine:
- 2.0L Turbocharged M139 Inline-4 Engine
Performance Gains
Stage 1 / Stage 2 Gains
- Horsepower Gain: +70 HP
- Torque Gain: +70 LB-FT
Additional Notes
- The Mercedes-Benz A45 AMG includes factory torque and horsepower limitations. A CPC module is recommended to maximize available performance.
- Without a CPC module, expected gains are approximately:
- +40 HP
- +40 LB-FT Torque
- Vehicles with build dates after June 2020 (06/2020+) may have a factory-locked ECU. If an ECU unlock is not purchased, the ECU must be unlocked separately before tuning.
Tuning Process
- Purchase your GCA Performance ECU Tune.
- Receive tuning instructions via email.
- Connect the provided tuning cable to your vehicle.
- Read and send your factory ECU file.
- GCA Performance calibrates your ECU software.
- Upload the tuned file and experience increased AMG performance.
Specifications
- Brand: German Car Accessories (GCA)
- Product: Performance ECU Tune
- Vehicle: Mercedes-Benz A45 AMG / A45 S AMG
- Years: 2020-2025
- Chassis: W177
- Engine: 2.0L Turbo M139
- Tuning Options: Stage 1 / Stage 2
- Installation: ECU Flash Tune
- Warranty: 1 Year
