Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Transform the performance and drivability of your 2011-2018 Mercedes-Benz CLS300, CLS350, or CLS400 with the German Car Accessories (GCA Performance) ECU Tune. Engineered with a performance-first mindset, this ECU calibration is designed to improve throttle response, strengthen torque delivery, and optimize the entire powerband for a sharper, more responsive driving experience.
This is more than simply adding horsepower. GCA Performance tuning optimizes how your Mercedes-Benz delivers power throughout the RPM range, providing stronger mid-range acceleration, improved top-end pull, and more immediate throttle response.
GCA Performance securely saves your factory ECU data before tuning, allowing you to return your vehicle to its original stock calibration at any time.
Fitment
Compatible with:
- 2011-2018 Mercedes-Benz CLS300 (W218/C218)
- 2011-2018 Mercedes-Benz CLS350 (W218/C218)
- 2011-2018 Mercedes-Benz CLS400 (W218/C218)
- Drivetrain: RWD and 4MATIC
- Engine: 3.0L / 3.5L V6 Turbocharged M276
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 +60 HP
- Torque Gain: Up to +60 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.
