Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unleash the hidden performance of your 2012-2016 Mercedes-Benz GL400 or GL450 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 3.0L Twin Turbo M276 V6, delivering noticeable gains in horsepower, torque, throttle response, and overall drivability.
Designed with performance as the priority, this ECU tune completely transforms the driving experience of your GL-Class. Turbo response becomes quicker, throttle input is more immediate, and power delivery is stronger and more consistent throughout the entire RPM range. Whether you're accelerating onto the highway, towing, or simply enjoying everyday driving, your GL400 or GL450 will feel significantly more responsive and capable.
Every GCA Performance ECU Tune is custom-calibrated to your vehicle and fuel quality, ensuring optimized performance while maintaining reliability. Both Stage 1 and Stage 2 calibrations 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 cost 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 tuning begins, your original ECU file is securely backed up, allowing your vehicle to be restored to factory software at any time.
After purchase, German Car Accessories supplies the required programming cable along with 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:
- 2012-2016 Mercedes-Benz GL400
- 2012-2016 Mercedes-Benz GL450
- W166 / X166 Chassis
- 3.0L Twin Turbo V6 M276 Engine
Performance Gains
- Up to 60 HP Increase
- Up to 60 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 Turbo Response
- Increased Horsepower and Torque
- 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 GL400 / GL450
- Chassis: W166 / X166
- Engine: 3.0L Twin Turbo V6 M276
- Tuning Stages: Stage 1 / Stage 2
- Installation Method: ECU Flash via Included Programming Cable
