Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the hidden performance potential of your 2023+ Mercedes-Benz GLC300 X254/C254 with the GCA Performance ECU Tune. Designed with a performance-first mindset, this ECU calibration enhances engine response, acceleration, and overall driving dynamics while optimizing the factory powertrain.
Developed by German Car Accessories (GCA) under our GCA Performance lineup, this tune improves throttle response, strengthens torque delivery, and sharpens the entire powerband for a more engaging driving experience. Whether cruising daily or enjoying spirited driving, your GLC300 will feel more responsive, powerful, and refined.
GCA Performance securely saves your factory ECU data, allowing you to restore your vehicle back to the original factory settings at any time.
We Stand Behind Our Products
- All GCA Performance products include a 1-Year Warranty.
Fitment
Fits:
- 2023 Mercedes-Benz GLC300 X254
- 2024 Mercedes-Benz GLC300 X254
- 2025 Mercedes-Benz GLC300 X254
- 2026 Mercedes-Benz GLC300 X254
- 2023+ Mercedes-Benz GLC300 C254 Coupe
- Equipped with the 2.0L Turbocharged M254 Engine
Key Features
- Increased horsepower and torque output
- Improved throttle response and acceleration
- Optimized ECU calibration for enhanced performance
- Enhanced exhaust acoustics with adjustable burble options
- Factory speed governor removal
- Octane-specific calibration based on fuel quality
- Fully reversible ECU tuning
- Stage 1 and Stage 2 tuning options available
- Supports factory downpipes and GCA Performance downpipes
Tuning Specs
- Engine: 2.0L Turbocharged M254 Engine
- Horsepower Gain: +60 HP
- Torque Gain: +60 TQ
- Stage 1: Factory Downpipes
- Stage 2: GCA Performance Downpipes
- Factory ECU data backup included
- 100% reversible back to stock settings
ECU Unlock Information
- The factory ECU on these vehicles comes locked.
- If an ECU unlock is not purchased, the customer must arrange ECU unlocking before tuning can be performed.
Installation Instructions
After purchase:
- Tuning instructions will be emailed to you.
- ECU removal and shipment to GCA may be required for tuning.
- Professional installation is strongly recommended.
Disclaimer
Removing, disabling, or altering emissions equipment on pollution-controlled vehicles may be illegal. This product is intended only for racing, competition, track, hobby, or off-road use. Installation and usage of aftermarket software may affect drivability, reliability, emissions compliance, insurance coverage, and factory warranty. All installation and usage risks are assumed by the end user and installer.
