Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the full performance potential of your 2020-2023 Mercedes-Benz GLS450 with the GCA Performance ECU Tune. Designed by German Car Accessories (GCA) under our performance division, this custom ECU calibration transforms the way your GLS450 responds, accelerates, and delivers power.
Engineered specifically for the 3.0L Turbocharged M256 Inline-6 engine, this tune optimizes engine parameters to provide sharper throttle response, stronger torque delivery, and improved overall drivability. From daily driving to spirited acceleration, the optimized calibration enhances the entire powerband for a more responsive and engaging experience.
GCA Performance securely saves your original ECU data, allowing you to restore your vehicle back to factory settings at any time. Each tune is calibrated according to your vehicle setup and fuel quality to maximize performance while maintaining factory reliability.
For vehicles equipped with aftermarket downpipes, Stage 2 tuning is available with GCA Performance Downpipes. Stage 2 calibration is included at no additional cost. Downpipe readiness and check engine light suppression are available for off-road applications only.
The GLS450 comes equipped with factory torque and horsepower limitations. To maximize tuning potential, a CPC module upgrade is recommended. Vehicles manufactured after June 2020 may require an ECU unlock before tuning can be performed.
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 GLS450 X167/W167
- Improved throttle response
- Increased horsepower and torque output
- Optimized turbocharger performance
- Stronger mid-range acceleration
- Enhanced power delivery throughout the RPM range
- Factory speed limiter removal
- Octane-specific calibration based on fuel quality
- 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 capability
- 100% reversible back to stock
- Remote tuning via supplied cable
Vehicle Fitment
Fits:
- 2020 Mercedes-Benz GLS450
- 2021 Mercedes-Benz GLS450
- 2022 Mercedes-Benz GLS450
- 2023 Mercedes-Benz GLS450
Chassis:
- X167 / W167
Engine:
- 3.0L Turbocharged Inline-6 M256 Engine
Performance Gains
Stage 1 / Stage 2 Gains
- Horsepower Gain: +70 HP
- Torque Gain: +70 LB-FT
Additional Notes
- The GLS450 includes factory torque and horsepower limitations. A CPC module is recommended to achieve maximum 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 enjoy increased performance.
Specifications
- Brand: German Car Accessories (GCA)
- Product: Performance ECU Tune
- Vehicle: Mercedes-Benz GLS450
- Years: 2020-2023
- Chassis: X167 / W167
- Engine: 3.0L Turbo Inline-6 M256
- Tuning Options: Stage 1 / Stage 2
- Installation: ECU Flash Tune
- Warranty: 1 Year
