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 2016-2019 Mercedes-Benz GLS63 AMG with the German Car Accessories (GCA Performance) ECU Tune. Engineered with a performance-first mindset, this ECU calibration is designed to make throttle response more immediate, torque delivery stronger and more consistent, and the entire powerband sharper and more responsive.
This is more than a simple horsepower upgrade. GCA Performance ECU tuning optimizes the 5.5L Twin Turbo V8 M157 engine throughout the RPM range, delivering stronger mid-range acceleration, improved top-end pull, and a more responsive and engaging driving experience.
GCA Performance securely saves your factory ECU data before tuning, allowing your vehicle to be returned to its original stock calibration at any time.
Fitment
Compatible with:
- 2016-2019 Mercedes-Benz GLS63 AMG (X166/W166)
- Engine: 5.5L Twin Turbo V8 M157
Tuning Specifications
- Stage 1 tuning available for vehicles with factory downpipes
- Stage 2 tuning available for vehicles equipped with GCA Performance downpipes
- Stage selection will be confirmed through the tuning instructions after purchase
- No additional charge for Stage 2 tuning
- Downpipe readiness with check engine light suppression (for off-road use only)
- Enhanced exhaust acoustics with extended or adjustable burble settings
- Factory speed governor removal for unrestricted performance
- Octane-specific calibration tailored to your fuel quality
- Cold start behavior fully configurable (On/Off)
- 100% reversible tuning with the ability to return to stock settings at any time
- Factory ECU data securely saved before tuning
Performance Gains
- Horsepower Gain: Up to +100 HP
- Torque Gain: Up to +100 TQ
Tuning Instructions
- After purchase, GCA Performance will email detailed tuning instructions.
- The vehicle can be tuned using a provided tuning cable.
- The required tuning cable will be provided for the tuning process.
Warranty
- All German Car Accessories products are backed by a 1-Year Warranty.
