Description Mercedes X-Class 350d (Euro 6 D-Temp) ECU Remap Unlock safe, proven gains with professional ECU tuning for your Mercedes X-Class 350d (Euro 6 D-Temp) through our in-house ECU calibration. Whether you choose a Stage 1, 2 or 3 calibration, each level is designed to safely enhance performance, torque, and drivability for your exact setup. All tuning is completed in-house by Sunshine Coast Diesel Tuning using advanced, licensed calibration tools with dyno verification available. Stage 1 – The Best Bang for Your Buck Stage 1 tuning delivers the most noticeable improvement for the least cost — a true transformation without changing any factory hardware. Power increases from 258 hp to 300 hp and torque from 550 Nm to 700 Nm, giving you smoother delivery, stronger mid-range pull, and improved towing capability. Measured Gains: 42 hp / 150 Nm (258 → 300 hp, 550 → 700 Nm) Hardware: No modifications required Benefits: Sharper throttle, smoother drivability, safer overtaking Recommended Upgrades: Intercooler, performance intake, and cat-back exhaust for improved cooling and efficiency Stage 1 is the perfect entry-level upgrade — reliable, efficient, and ideal for everyday driving or towing applications. Stage 2 – Performance Hardware Upgrade Stage 2 tuning builds upon the Stage 1 calibration, designed for vehicles equipped with supporting performance hardware. This level provides sustained torque and power under heavy load, making it perfect for off-road setups, heavy towing, or performance enthusiasts seeking stronger throttle response. Expected Gains: Approximately 60 hp / 200 Nm (estimate dependent on hardware) Minimum Requirements: Upgraded intercooler, performance intake, and full exhaust system Benefits: Improved mid-range torque, reduced EGTs, more consistent high-load performance Custom Calibration: Individually tuned to match your vehicle’s hardware and driving style Stage 2 delivers the perfect balance of power and reliability. With proper cooling and airflow upgrades, it ensures dependable performance for towing, off-roading, or spirited driving. Stage 3 – Maximum Performance Stage 3 is designed for full performance builds where every supporting component has been upgraded. It provides the most aggressive power and torque gains through refined fuelling and advanced boost strategies, ideal for competition or off-road use. Expected Gains: Up to 80 hp / 250 Nm (varies based on turbo and fuel upgrades) Minimum Requirements: All Stage 2 upgrades plus upgraded turbocharger or supercharger and fuel system modifications Purpose: Built for maximum response and output for off-road or motorsport applications Custom Calibration: Tailored to ensure safe operation under high stress and temperature Stage 3 is the ultimate choice for enthusiasts looking to extract every bit of potential from their Mercedes X-Class 350d, while maintaining reliability when built correctly. Additional Options (Off-Road Use Only) EGR Deactivation (off-road use only) DPF Deactivation (off-road use only) AdBlue Deactivation (off-road use only) Hardcut Limiter *Off-road options are intended for closed-course or off-road use only. See our Terms & Conditions for details. Specifications Vehicle: Mercedes X-Class 350d Euro 6 D-Temp ECU Type: Factory ECU (calibrated in-house) Stage 1 Gains: 42 hp / 150 Nm (258 → 300 hp, 550 → 700 Nm) Stage 2 Gains: 60 hp / 200 Nm (approximate) Stage 3 Gains: 80 hp / 250 Nm (approximate) Hardware Changes: Required for Stage 2–3 only Hardware Included: None; parts quoted separately based on customer specifications What’s Included On-site ECU remap at Sunshine Coast Diesel Tuning Same-day turnaround (by appointment) Dyno verification available Optional remote tuning tool ( $600 with shipping in Australia and New Zealand) Custom calibration tailored to your vehicle and hardware setup Professional ECU Tuning on the Sunshine Coast All tuning is carried out by our experienced team using industry-grade calibration tools and dyno equipment. We focus on smooth, reliable power delivery suited to Australian conditions. Book your ECU remap today via the Sunshine Coast Diesel Tuning website.
