Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the full performance potential of your 2012-2015 Mercedes-Benz ML500/ML550 W166 with the GCA Performance ECU Tune. Developed with a performance-first mindset, this custom ECU calibration transforms the way your SUV responds, accelerates, and delivers power.
Designed specifically for the 4.7L Twin Turbo V8 M278 engine, the GCA Performance tune optimizes throttle response, torque delivery, and overall powerband performance. Experience stronger acceleration, improved mid-range pull, and sharper engine response while maintaining smooth and reliable drivability.
This ECU upgrade goes beyond simply adding power. Every aspect of the engine calibration is refined to maximize performance throughout the RPM range, allowing your ML500/ML550 to deliver a more responsive and engaging driving experience.
GCA Performance securely saves your original ECU data, allowing you to return your vehicle to factory settings at any time. With both Stage 1 and Stage 2 tuning options available, you can choose the calibration that matches your setup, whether running factory downpipes or upgrading with GCA Performance Downpipes.
Features & Benefits
- Designed by German Car Accessories under the GCA Performance line
- Custom ECU tuning for Mercedes-Benz ML500/ML550 W166 models
- Optimized throttle response and power delivery
- Increased horsepower and torque output
- Improved turbocharger efficiency and engine response
- Octane-specific calibration based on fuel quality
- Factory speed limiter removal for unrestricted performance
- Adjustable exhaust burble settings
- Configurable cold start behavior (On/Off)
- Downpipe readiness with check engine light suppression (for off-road use only)
- Stage 1 and Stage 2 tuning available
- Original ECU data securely saved
- 100% reversible back to factory settings
- Remote tuning via provided cable
- Backed by a 1-Year Warranty
Tuning Specs
- Fits: 2012 2013 2014 2015 W166 Mercedes-Benz ML500 / ML550
- Engine: 4.7L Twin Turbo V8 M278 Engine
- Stage 1: Designed for vehicles with factory downpipes
- Stage 2: Designed for vehicles equipped with GCA Performance Downpipes
- Horsepower Gain: Up to +100 HP
- Torque Gain: Up to +100 TQ
Tuning Instructions
- Once purchased, tuning instructions will be emailed to you.
- The vehicle can be tuned remotely using the provided cable.
- Stage selection will be confirmed through the tuning instructions based on your vehicle setup.
- Stage 2 tuning is available at no additional cost when required.
