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 2018-2023 Mercedes-Benz G500/G550 W463A/W464 with the GCA Performance ECU Tune. Developed with a performance-first approach, this custom ECU calibration transforms the way your G-Class responds, accelerates, and delivers power.
Designed specifically for the 4.0L Twin Turbo V8 M176 engine, the GCA Performance tune improves throttle response, strengthens torque delivery, and sharpens overall engine performance. Experience stronger acceleration, improved mid-range power, and a more responsive driving experience throughout the entire RPM range.
This ECU upgrade is designed to enhance both performance and drivability while maintaining the luxury and reliability expected from the Mercedes-Benz G-Class. GCA Performance securely saves your original ECU data, allowing your vehicle to be returned to factory settings at any time.
With support for both Stage 1 and Stage 2 tuning, the calibration can be customized for vehicles running factory downpipes or upgraded with GCA Performance Downpipes.
Features & Benefits
- Designed by German Car Accessories under the GCA Performance line
- Custom ECU tuning for Mercedes-Benz G500/G550 W463A/W464 models
- Optimized throttle response and acceleration
- Increased horsepower and torque output
- Improved turbocharger response and power delivery
- Enhanced performance throughout the RPM range
- Octane-specific calibration tailored to fuel quality
- Factory speed limiter removal
- Adjustable exhaust burble settings
- Configurable cold start behavior (On/Off)
- Downpipe readiness with check engine light suppression (for off-road use only)
- Stage 1 and Stage 2 tuning available
- Factory ECU data securely saved
- 100% reversible back to stock settings
- Remote ECU tuning using provided cable
- Backed by a 1-Year Warranty
Tuning Specs
- Fits: 2018 2019 2020 2021 2022 2023 W463A/W464 Mercedes-Benz G500 / G550
- Engine: 4.0L Twin Turbo V8 M176 Engine
- Stage 1: Designed for vehicles with factory downpipes
- Stage 2: Designed for vehicles equipped with GCA Performance Downpipes
- Horsepower Gain: Up to +100 HP
- Torque Gain: Up to +100 TQ
Important Tuning Notes
- 2019-2023 models include factory horsepower and torque limiters. A CPC module is recommended to maximize performance gains.
- Without a CPC module, expected gains are approximately +60 HP and +60 TQ.
- Vehicles with build dates after June 2020 (6/2020+) may have factory-locked ECUs. An ECU unlock must be completed before tuning can be performed.
- Stage selection will be confirmed through the tuning instructions after purchase.
- Stage 2 tuning does not require an additional tuning fee.
Tuning Instructions
- Once purchased, tuning instructions will be emailed to you.
- The vehicle can be tuned remotely using the provided cable.
- Follow the included instructions to complete the ECU calibration process.
