Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the hidden performance of your 2006-2011 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 ECU calibration is specifically engineered for the 5.5L Naturally Aspirated M273 V8, delivering substantial gains in horsepower, torque, throttle response, and overall drivability.
Designed with a performance-first approach, this calibration optimizes every aspect of your engine's operation. Throttle response becomes noticeably quicker, acceleration is smoother and more immediate, and power delivery is stronger throughout the entire RPM range. Whether you're cruising on the highway or accelerating from a standstill, your S-Class responds with improved confidence and performance.
Each GCA Performance ECU Tune is customized for your vehicle and fuel quality, ensuring safe and reliable performance while maximizing power. Both Stage 1 and Stage 2 calibrations are available. Stage 1 is designed for vehicles with factory exhaust components, while Stage 2 is optimized for vehicles equipped with GCA Performance Downpipes. There is no additional cost for Stage 2 tuning.
Additional features include configurable cold start operation, factory speed limiter removal, adjustable exhaust burble settings, and check engine light suppression for compatible off-road downpipe applications. Before tuning begins, your original ECU calibration is securely backed up, allowing you to return your vehicle to factory settings whenever desired.
Following your purchase, German Car Accessories provides the required programming cable along with detailed tuning instructions, allowing you to flash your ECU conveniently from home.
Every GCA Performance ECU Tune is backed by a 1-Year Warranty.
Fitment
Fits:
- 2006-2011 Mercedes-Benz S500
- 2006-2011 Mercedes-Benz S550
- W221 Chassis
- RWD and 4MATIC Models
- 5.5L Naturally Aspirated V8 M273 Engine
Performance Gains
- Up to 100 HP Increase
- Up to 100 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
- Improved Horsepower and Torque Delivery
- 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: 5.5L Naturally Aspirated V8 M273
- Drivetrain: RWD / 4MATIC
- Tuning Stages: Stage 1 / Stage 2
- Installation Method: ECU Flash via Included Programming Cable
