Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unleash the full performance potential of your 2011-2013 Mercedes-Benz S500 or S550 with the German Car Accessories Performance ECU Tune. Developed by German Car Accessories (GCA) under our GCA Performance line, this precision ECU calibration is specifically engineered for the 4.7L Twin Turbo M278 V8, delivering remarkable gains in horsepower, torque, throttle response, and overall drivability.
Designed with a performance-first approach, this ECU tune transforms the way your S-Class accelerates and responds. Turbo response is quicker, throttle input becomes noticeably sharper, and torque delivery is significantly stronger throughout the entire powerband. Whether you're merging onto the highway, overtaking traffic, or enjoying spirited driving, your S500 or S550 will feel more responsive, more refined, and substantially more powerful.
Each GCA Performance ECU Tune is custom-calibrated to your vehicle and fuel quality, ensuring maximum performance while maintaining factory-like reliability. Both Stage 1 and Stage 2 tuning options are available. Stage 1 is designed for vehicles equipped with factory downpipes, while Stage 2 is optimized for vehicles fitted with GCA Performance Downpipes. There is no additional charge for Stage 2 tuning.
Additional tuning features include factory speed limiter removal, configurable cold start operation, adjustable exhaust burble settings, and check engine light suppression for compatible off-road downpipe applications. Before any tuning is performed, your factory ECU file is securely backed up, allowing your vehicle to be returned to its original calibration whenever desired.
Following your purchase, German Car Accessories provides the required programming cable and detailed installation instructions, allowing you to flash your ECU safely and conveniently from home.
Every GCA Performance ECU Tune is backed by a 1-Year Warranty.
Fitment
Fits:
- 2011-2013 Mercedes-Benz S500
- 2011-2013 Mercedes-Benz S550
- W221 Chassis
- Sedan, Coupe, and Cabriolet Models
- 4.7L Twin Turbo V8 M278 Engine
Performance Gains
- Up to 120 HP Increase
- Up to 150 lb-ft Torque Increase
Features
- Designed by German Car Accessories (GCA)
- GCA Performance ECU Calibration
- Stage 1 Tuning Available
- Stage 2 Tuning Available (GCA Performance Downpipes)
- No Additional Charge for Stage 2 Calibration
- Faster Throttle Response
- Increased Turbo Response
- Significant Horsepower and Torque Gains
- Optimized Powerband Performance
- Octane-Specific ECU Calibration
- Factory Speed Limiter Removal
- Adjustable or Extended Exhaust Burble
- Configurable Cold Start Function (On/Off)
- Downpipe Check Engine Light Suppression (Off-Road Use Only)
- Factory ECU File Securely Backed Up
- 100% Reversible to Factory Software
- Programming Cable Included
- Detailed Installation Instructions Provided After Purchase
- Backed by a 1-Year Warranty
Specifications
- Brand: German Car Accessories
- Product: Performance ECU Tune
- Vehicle: Mercedes-Benz S500 / S550
- Chassis: W221
- Engine: 4.7L Twin Turbo V8 M278
- Body Styles: Sedan, Coupe, Cabriolet
- Tuning Stages: Stage 1 / Stage 2
- Installation Method: ECU Flash via Included Programming Cable
