Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Engineered with a performance-first mindset, the German Car Accessories (GCA Performance) ECU Tune transforms the way your Mercedes-Benz S65 AMG responds, accelerates, and delivers power. This is more than a simple horsepower upgrade — it is a complete improvement in drivability, throttle response, torque delivery, and overall performance.
GCA Performance ECU tuning optimizes the complete powerband of the Mercedes M275 Twin Turbo V12 engine, providing stronger mid-range acceleration, improved top-end pulling power, and a sharper response throughout the RPM range. Every calibration is designed to maximize performance while maintaining a refined driving experience.
GCA Performance securely saves your factory ECU data before tuning, allowing your vehicle to be fully restored back to the original stock settings at any time.
Fitment
Compatible with:
- 2006-2013 Mercedes-Benz S65 AMG W221
- Engine: 6.0L Twin Turbo V12 M275
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 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
Performance Gains
- Horsepower Gain: Up to +120 HP
- Torque Gain: Up to +120 TQ
Tuning Instructions
- After purchase, GCA Performance will email detailed tuning instructions
- The vehicle can be tuned remotely using a provided tuning cable
Warranty
- All German Car Accessories products include a 1-year warranty.
